User:Joseph.voip.ms/Sandbox - VoIP.ms Wiki

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User:Joseph.voip.ms/Sandbox

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-
The '''Manage DID''' section is where you can see listed your DID numbers, check and edit their routes (where the call will be routed) and other options as well like enable/disable [[SMS | SMS]], [[Voicemail#Assigning_your_Voicemail_to_your_DID | assign  Voicemail]]'s to them, set their fail over options, etc.
+
== Choosing a Server ==
 +
[http://www.voip.ms VoIP.ms] offers many different servers, but which one should you choose? One misconception is that you should pick the closest to your location, however this is not needed most of the time. For example, if you are in the USA, any of the US servers will provide a really good latency and service quality. The newest server within a city is indicated with the highest number attached to the name, as they are classified in ascending order. Also worth noting is that there is a network tool that will help you when deciding which server you want to use, generally named a "ping", which will provide you the latency between you and the server. Therefore the server which provides you less latency should be used.
-
Once you have DID numbers in your account, you will have to edit their default settings in order to receive/forward/route the incoming calls the way you need to. To do this you need to access the "'''Manage DID(s)'''" option from the "'''DID Numbers'''" menu tab.
+
=== Server Points of Presence ===
-
[[File:MenuOption.jpg|thumb|none|600px]]
+
In the following links you will find a table with the server's information including their IP addresses.
-
__TOC__
+
{| class="wikitable" style="font-size: 200%; border: none; width: 60%; height: 80px; text-align: center;"
 +
| [[Servers#Canada | Canada]] || [[Servers#USA  | USA]] || [[Servers#International  | International]]
 +
|}
-
== DID's information ==
+
[[File:ChooseServerImg.png|thumb|none|1280px|VoIP.ms servers]]
-
At this part you can see the general information for the DID numbers (once you have [[Order a DID Number | ordered]] or [[Porting a Number | ported ]]  a DID number in)
+
===Server Realms===
-
Here you will see different keywords and icons that you may not be familiar with, however you can get a quick description of each one of them by clicking on the "'''Help'''" icon at the top right of the page. There is also the option to ''Export Account DIDs'', this will create a .txt file of your DID numbers and their rate centers.  
+
Please click here [http://wiki.voip.ms/article/Server_Realms Server Realms] to get the Realm Name for the server you plan on using, this can differ from the Domain Name being used.  
-
[[File:ManageDIDs.png|thumb|none|600px]]
+
Please note that the following servers will not be available to select as a DID Point of Presence for newer accounts:  
 +
Atlanta 1, Chicago 1, New York 1, New York 4, Seattle 1, Montreal 1, Montreal 2, Montreal 3, Montreal 4, Toronto, Toronto 2, Toronto 3, Toronto 4.
-
== Edit a single DID number ==
+
= What is a Ping? =
-
If you need to access the options to edit a single DID, the easiest way is to click on the little "'''Paper and pencil'''" icon.
+
Ping is a standard tool used to test network connections. It is mostly used to determine if a server or device can be reached across the network and the latency of the response(the time it takes to send a packet to the destination and for it to return to your computer).
 +
Ping tools are part of Windows, Mac OS X and Linux as well as some routers.
-
[[File:EditDID.png|thumb|none|600px]]
+
== How does the ping work? ==
 +
It sends request messages to a target network address or DNS names at periodic intervals and measures the time it takes for a response message to arrive and return(better known as latency).
-
The first and Main section you will see, is the "'''DID Routing'''" section, which may or may not have all the options available, this simply depends on which features you have already enabled from your portal, that is, if you have not created a [[Voicemail]], you wont be able to select this option and apply it to a DID.
+
==How to ping on a PC==
-
This is basically the route the call will take, when someone calls to the DID. Whatever you select here, is the route the call will follow and will apply for all the calls.
+
Pinging is a command which tells you if the connection between your computer and a particular domain is working correctly.
-
In order to select an option, you need to click on the radio button, and then select the desired choice from the drop-down list (in case you have more than one option for that routing).
+
In Windows, select Start > Programs > Accessories > Command Prompt. This will give you a window like the one below.
 +
Enter the word ping, followed by a space, then the domain name.(montreal.voip.ms) in this case domain is our server name.
-
[[File:Routing.png|thumb|none|600px]]
+
If the results show a series of replies, the connection is working. The time shows you how fast the connection is. If you see a "timed out" error instead of a reply, there is a breakdown somewhere between your computer and the domain.
-
== DID's Point of Presence (POP) ==
+
[[File:Ping.gif|thumb|none|600px|Ping]]
 +
==How to ping on a Mac Computer==
-
*You can also click the '''Show Failover Options''' button, which will display 3 more DID routing sections, just like the Main, except these are meant to be used for each one of the 3 call states, Unreachable, Busy and No answer.
+
1- Click on Finder in the dock.
-
This allows you to set a customized routing when the call reaches 1 of the 3 Call states, instead of just going to the [[Voicemail]].
+
-
*After, we have the '''[[Voicemail]]''' setting, here is where you need to assign a Mailbox to your DID.
+
2- Click on Applications.
-
*'''DID point of presence''', this setting is the server where you will locate your DID, in order to route the calls, this setting must match the same [[Choosing Server|server or proxy]] you are using on your [[Welcome#Devices|ATA device]], [[Welcome#PBX|PBX]] trunk or [[Welcome#Softphones|softphone]] registration in order to receive calls.
+
3- Click on Utilities.
-
[[File:PointOfPresence.png|thumb|none|600px]]
+
4- Double-click on Network Utility. *
-
== Additional settings ==
+
* In OS X Mavericks (10.9.x) this utility app changed location. Launch it from spotlight instead, either press "command"+"space bar" or click on spotlight directly (magnifying glass icon at top right of screen), type "network utility" and hit "return"
 +
5- In the Network Utility window, click on the Ping tab
-
*'''Ring Time in seconds''', is basically the time the call will ring before it reaches one of the Failover states or [[Voicemail]].
+
6- In the field under "Please enter the network address to ping," like montreal.voip.ms
-
*'''Caller ID name lookup''', when you enable this option, the system will perform a Query on the Databases, looking for a name matching the number of your caller, and will display the name on the [[Caller ID]] name section of the [[Caller ID]].
 
-
*'''Caller ID name prefix''', this setting will simply add any word you set, as a prefix to the [[Caller ID]] name you receive. Will also work even if you don't have "Caller ID name lookup" enabled or if you don't receive a [[Caller ID]] name. This option is specially useful when you need to differentiate incoming calls from different DIDs going to the same phone.
+
''If pings results are not consistent, you may have an issue with Jitter. You can work on this issue by adjusting the "Network Jitter Level" setting on your VoIP device. Usually a ping of under 150 ms is recommended in order to have good quality. The latency time to the server is important, however there are also other factors that could affect the quality of the calls such as packet loss (VoIP communications are very sensitive to this), and the Jitter level of your Internet connection.''
-
*'''Note''', this is just an Internal description for the DID, so you can manage them.
+
The following is the output of running ping with the target losangeles.voip.ms.
 +
#ping losangeles.voip.ms
 +
Ping to losangeles.voip.ms [67.215.241.250] with 32 bytes de datos:
 +
Response from 67.215.241.250: bytes=32 time=67ms TTL=52
 +
Response from 67.215.241.250: bytes=32 time=69ms TTL=52
 +
Response from 67.215.241.250: bytes=32 time=68ms TTL=52
 +
Response from 67.215.241.250: bytes=32 time=67ms TTL=52
 +
ping statistics from 67.215.241.250:
 +
4 packets transmitted, 4 received, 0% packet lost. rtt min/avg/max/mdev = 67ms, 69ms, 67ms
-
  '''Remember that none of these changes will be saved until you press the "Click here to apply changes settings" button.'''
+
Sample ping output in windows:
 +
  C:\Windows\system32>ping montreal.voip.ms
 +
 +
Pinging montreal.voip.ms [67.205.74.184] with 32 bytes of data:
 +
Reply from 67.205.74.184: bytes=32 time=85ms TTL=49
 +
Reply from 67.205.74.184: bytes=32 time=86ms TTL=49
 +
Reply from 67.205.74.184: bytes=32 time=86ms TTL=49
 +
Reply from 67.205.74.184: bytes=32 time=85ms TTL=49
 +
 +
Ping statistics for 67.205.74.184:
 +
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
 +
Approximate round trip times in milli-seconds:
 +
    Minimum = 85ms, Maximum = 86ms, Average = 85ms
 +
= Latency Testing Scripts (User Submitted) =
 +
<p>All the following scripts were produced by voip.ms users who felt others might also benefit from the output of their efforts.  They were written over a span of Years and probably need adjusting before you use them, to cater for changes in servers over time and changes in policies (like not testing heavily subscribed servers which are not open to new registrations)</p>
 +
<p>If you aren't satisfied that the scripts are safe or simply don’t like the way they syntactically appear, you can still manually ping a selection of servers and choose a server based on the best latency. The following scripts are essentially just wrappers around the ping command which support lists of servers to feed to ping and present the output in a readable format.</p>
 +
<p>If you feel you have a simpler cleaner script that works for another platform or language, please do add it to this wiki via a support ticket.
 +
</p>
 +
=== Bash Script To Handle The Mac Ping Output Format ===
-
== Editing Multiple DIDs at a time ==
+
<p>To make use of this script (1) save as a plain text file (2) set permissions on the file to executable (3) invoke script
 +
e.g. Save script below using your favourite editor as pingVoipMS.sh (2) chmod u+x pingVoipMS.sh (3) ./pingVoipMS.sh
 +
This is a bash 3.x script, so it also works in Linux, just change the ping packet loss field from 7 to 6 in the final loop below (or wherever the loss field is in your ping output format).  Depending upon your distro curl might need to change to wget.
 +
</p>
 +
<pre>
 +
#!/bin/bash
 +
# Ping several servers and display Latency, Jitter and Packet Loss
 +
#      Usage: [-c <count>][-i <wait time>][-r test restricted servers][<server list file>]
 +
#
 +
# The optional text file should be formatted with one host name per line.
 +
# The list of voip.ms servers is available at http://wiki.voip.ms/article/Choosing_Server
 +
# If no args are supplied, this script will scrape a ping server list from voip.ms
 +
#
 +
USER_FILE=""
 +
COUNT=3; INTERVAL=5; RESTRICTED=0
 +
restrictedList=(atlanta.voip.ms chicago.voip.ms
 +
                montreal.voip.ms montreal2.voip.ms montreal3.voip.ms montreal4.voip.ms
 +
                newyork.voip.ms newyork4.voip.ms seattle.voip.ms
 +
                toronto.voip.ms toronto2.voip.ms toronto3.voip.ms toronto4.voip.ms)
 +
# Handle any passed in script arguments
 +
while getopts c:i:r parm
 +
do
 +
    case $parm in
 +
        c)count_opt=$OPTARG;;
 +
        i)interval_opt=$OPTARG;;
 +
        r)RESTRICTED=1;;
 +
        *)echo -e "Invalid arg\nUsage:\t[ -c <count of ECHO_REQUESTs to Tx, default 3> ] \
 +
                  \n\t[ -i <wait time (s) between datagrams, default 5> ]                \
 +
                  \n\t[ -r ] Include restricted servers in latency test                  \
 +
                  \n\t[FILE <ping server list> ]";exit 1;;
 +
    esac
 +
done
-
There are 2 additional buttons you will see when you access the Manage DID option from the menu, those are ''"Edit Selection - All settings at Once"'' and ''"Edit Selection - One Setting at a Time"''
+
# Test if an option was specified and whether it's a +ve non-zero integer
 +
[[ -n $count_opt    && ($count_opt =~ ^[[:digit:]]+$)    && $count_opt -gt 0 ]]    && COUNT=$count_opt
 +
[[ -n $interval_opt && ($interval_opt =~ ^[[:digit:]]+$) && $interval_opt -gt 0 ]] && INTERVAL=$interval_opt
-
'''"Edit Selection - All settings at Once"''', if you choose this option, you will enter an Edition page, the way the settings on this page end, is the exact way the settings will be applied to all the DIDs selected for edition. Be careful, as the final settings from the Edition page will be applied exactly as you see them, even those settings you did not change, will be replaced for the final configuration of the Edition page. That is if you select a [[Voicemail]], all the DIDs will use the same [[Voicemail]], if you leave a blank field like the "Caller ID prefix", all of the DIDs will have this setting blank.
+
shift $(($OPTIND -1))
-
This option is useful if you want all your DIDs with the exact same configuration for each one of the settings, including the NOTE.
+
-
'''"Edit Selection - One Setting at a Time"''', this option allows you to access the Edition page, but this time, every setting will have its own independent "Apply" button, so you can make a change to a specific setting, without affecting the rest.
+
# Validate supplied file (server list)
-
This option is useful if you already have your DIDs configured with different settings, and you need to set only a specific setting for all of them. By doing it this way, the rest of the settings from the DIDs will remain untouched.
+
[[ -n $1 && !(-f $1 && -r $1) ]] && { echo "\"$1\" file does not exist or is not readable"; exit 1; }
 +
[[ -n $1 && -f $1 && -r $1 ]] && USER_FILE="$1"
 +
 
 +
if [[ -n $USER_FILE ]]
 +
then
 +
# Bash 3.x in macOS does not support readarray, need to do cumbersome array loops instead
 +
    while IFS= read -r line; do
 +
        serverList+=( "$line" )
 +
    done < <(grep -e '[[:alpha:]]*[[:alnum:]]\.voip\.ms' $USER_FILE | grep  -v '^\s*#' | awk NF)
 +
else
 +
# N.B. The script looks for the html boldface tags <b> </b> inside a bracket
 +
# If the website alters and the parse fails, manually create the list and
 +
# supply as a script arg (or perhaps update the parsing to work again :)
 +
    while IFS= read -r line; do
 +
        serverList+=( "$line" )
 +
    done < <(curl --silent http://wiki.voip.ms/article/Choosing_Server | \
 +
            grep '(<b>[[:alpha:]]*[[:alnum:]]\.voip\.ms</b>)'        | \
 +
            tr "<>" " " | awk '{print $(NF-3)}'                        )
 +
fi
 +
 
 +
# Newer voip.ms clients can't register onto these over-subscribed servers
 +
# Don't test the restricted list unless explicitly asked (with the -r cmd line option)
 +
if [[ $RESTRICTED -eq 0 ]]
 +
then
 +
    for server in ${restrictedList[@]}
 +
    do
 +
        ix=$(printf "%s\n" "${serverList[@]}" | grep -n "^${server}" | cut -d ":" -f1)
 +
 
 +
        while IFS= read -r idx; do
 +
            keys+=($idx)
 +
        done < <([[ $ix -gt 0 ]] && echo $((ix-1)))
 +
    done
 +
    for ((i=${#keys[@]} - 1; i >= 0; i--)); do unset serverList[keys[i]]; done
 +
fi
 +
 
 +
if [[ ${#serverList[@]} -eq 0 ]]
 +
then
 +
    echo "No unrestricted Voip.ms servers could be found, please supply a server list"
 +
    exit 1
 +
fi
 +
 
 +
runTime=$(( $COUNT * $INTERVAL * ${#serverList[@]} ))
 +
 
 +
echo "PING will send $COUNT packet(s) with a wait of $INTERVAL sec(s) between each packet"
 +
echo "Change the PING options by invoking this script with -c and/or -i, default \"-c 3 -i 5\""
 +
echo "Over $((${#serverList[@]})) server(s) the estimated script Run Time will be $runTime seconds"
 +
echo "================================================================"
 +
printf "%-20s %-18s %7s %8s %6s  %s\n" "VoIP Server" "IP Address" "Latency" "Jitter" "Loss" "Countdown"
 +
echo "================================================================  (seconds)"
 +
 
 +
for myLn in ${serverList[@]}
 +
do
 +
    while IFS=$'\n' read -r line; do
 +
        pingList+=( "$line" )
 +
        printf "%-64s %5d  %2d/%-2d\n" "$line" "$((runTime - $COUNT * $INTERVAL * ${#pingList[@]}))" "${#pingList[@]}" "${#serverList[@]}"
 +
    done < <( ping -c $COUNT -i $INTERVAL -q $myLn | awk '\
 +
        /^PING / {myH=$2}
 +
        /^PING / {
 +
            IP = substr($3,2,15)
 +
            split(IP,myIP,")") }
 +
        /packet loss/ {myPL=$7}
 +
        /min\/avg\/max/ {
 +
            split($4,myS,"/")
 +
            printf("%-20s %-18s %7.3f %8.3f %6s\n",
 +
                    myH, myIP[1], myS[2], myS[4], myPL ) }
 +
    ' )
 +
done
 +
 
 +
echo "================================================================"
 +
echo -e "\nMost appropriate server listed in order of best latency\n"
 +
echo "================================================================"
 +
printf "%-20s %-18s %7s %8s %6s\n" "VoIP Server" "IP Address" "Latency" "Jitter" "Loss"
 +
echo "================================================================"
 +
printf "%s\n" "${pingList[@]}" | LC_ALL=C sort -n -k 3,3 -k 5,5 -k 4,4 | awk '{printf("%s    \(%2d\)\n",$0, NR)}'
 +
echo "================================================================"
 +
</pre>
 +
 
 +
=== Perl Script ===
 +
Pings list of voip.ms servers round robin with optional output csv file.
 +
 
 +
    # usage ping_voip.ms.pl <number of times> <seconds in between> <output.csv>
 +
    use Net::Ping;
 +
    use Time::HiRes;
 +
    use strict;
 +
   
 +
    # input list
 +
    my @hosts = qw(
 +
        atlanta.voip.ms
 +
        atlanta2.voip.ms
 +
        chicago.voip.ms
 +
        chicago2.voip.ms
 +
        chicago3.voip.ms
 +
        chicago4.voip.ms
 +
        dallas.voip.ms
 +
        denver.voip.ms
 +
        denver2.voip.ms
 +
        houston.voip.ms
 +
        losangeles.voip.ms
 +
        losangeles2.voip.ms
 +
        newyork.voip.ms
 +
        newyork2.voip.ms
 +
        newyork3.voip.ms
 +
        newyork4.voip.ms
 +
        seattle.voip.ms
 +
        seattle2.voip.ms
 +
        seattle3.voip.ms
 +
        tampa.voip.ms
 +
        washington.voip.ms
 +
        washington2.voip.ms
 +
        montreal.voip.ms
 +
        montreal2.voip.ms
 +
        montreal3.voip.ms
 +
        montreal4.voip.ms
 +
        toronto2.voip.ms
 +
        toronto3.voip.ms
 +
        toronto4.voip.ms
 +
        toronto.voip.ms
 +
        london.voip.ms
 +
    );
 +
   
 +
    $| = 1; #autoflush
 +
    # High precision syntax (requires Time::HiRes)
 +
    my $p = Net::Ping->new("icmp",1);
 +
    $p->hires();
 +
    my $max_name_length = (reverse sort { $a <=> $b } map { length($_) } @hosts)[0];
 +
    my $count = 4; # number of times to ping
 +
    my $interval = 5; # seconds between ping rounds
 +
    my $output_file = "";
 +
    my @data;
 +
   
 +
    # check for arguments
 +
    my $num_args = @ARGV;
 +
    if ($num_args >= 1) {$count = $ARGV[0];}
 +
    if ($num_args >= 2) {$interval = $ARGV[1];}
 +
    if ($num_args >= 3) {$output_file = $ARGV[2];}
 +
   
 +
    # check argument validity
 +
    $0 =~ /^.*\\(.*)$/;
 +
    my $script = $1;
 +
    if ($count !~ /^\d+$/ or $interval !~ /^\d+$/) {die "Usage: $script <number of rounds> <seconds between rounds> <output.csv>\n";}
 +
    if (length($output_file) > 0 and $output_file !~ /\.csv$/) {$output_file .= ".csv";}
 +
   
 +
    # main loop
 +
    for my $i (1..$count)
 +
    {
 +
        sleep $interval unless $i == 1;
 +
        print "Round $i\n";
 +
        my $host_num=0;
 +
        foreach my $host (@hosts)
 +
        {
 +
            (my $ret, my $duration, my $ip) = $p->ping($host);
 +
            $ip =~ /(\d+)\.(\d+)\.(\d+)\.(\d+)/;
 +
            if ($ret)
 +
            {
 +
                printf("%*s [ip: %3s.%3s.%3s.%3s] is alive (%6.2f ms)\n", $max_name_length, $host, $1, $2, $3, $4, $duration*1000);
 +
                $data[$host_num][$i]=$duration*1000;
 +
            }
 +
            else
 +
            {
 +
                printf("%*s [ip: %3s.%3s.%3s.%3s] is dead\n", $max_name_length, $host, $1, $2, $3, $4);
 +
            }
 +
            $host_num++;
 +
        }
 +
        print "\n";
 +
    }
 +
    $p->close();
 +
   
 +
    # if output file name given
 +
    if (length($output_file)>0)
 +
    {
 +
        # print output to file
 +
        open FILE, ">$output_file" or die "$!\n";
 +
       
 +
        # print column headers
 +
        print FILE "Server\\Round";
 +
        for my $i (1..$count)
 +
        {
 +
            print FILE ", $i";
 +
        }
 +
        print FILE ", Average\n";
 +
       
 +
        # print data
 +
        my $i = 0;
 +
        foreach my $host (@hosts)
 +
        {
 +
            print FILE "$host";
 +
            my $sum = 0;
 +
            for my $j (1..$count)
 +
            {
 +
                $sum += $data[$i][$j];
 +
                printf FILE ", %8.4f",$data[$i][$j];
 +
            }
 +
            printf FILE ", %8.4f\n",$sum/$count;
 +
            $i++;
 +
        }
 +
       
 +
        close FILE;
 +
        print "Data written to $output_file\n";
 +
    }
 +
   
 +
    # print summary to screen
 +
    my $i = 0;
 +
    printf("%-*s Average (ms)\n", $max_name_length, "Server");
 +
    foreach my $host (@hosts)
 +
    {
 +
        my $sum = 0;
 +
        for my $j (1..$count)
 +
        {
 +
            $sum += $data[$i][$j];
 +
        }
 +
        printf("%-*s %8.4f\n", $max_name_length+1, $host, $sum/$count);
 +
        $i++;
 +
    }
 +
 
 +
 
 +
Output:
 +
    Round 1
 +
        atlanta.voip.ms [ip: 174. 34.146.162] is alive ( 88.97 ms)
 +
      atlanta2.voip.ms [ip:  72.  9.246.170] is alive ( 92.99 ms)
 +
        chicago.voip.ms [ip: 208.100. 39. 52] is alive ( 49.70 ms)
 +
      chicago2.voip.ms [ip: 208.100. 39. 53] is alive ( 59.76 ms)
 +
      chicago3.voip.ms [ip: 208.100. 39. 54] is alive ( 59.53 ms)
 +
      chicago4.voip.ms [ip: 208.100. 39. 55] is alive ( 49.73 ms)
 +
        dallas.voip.ms [ip:  74. 54. 54.178] is alive ( 94.99 ms)
 +
        denver.voip.ms [ip: 173.248.161. 90] is alive ( 94.05 ms)
 +
        denver2.voip.ms [ip: 173.248.159.210] is alive ( 85.13 ms)
 +
        houston.voip.ms [ip: 209. 62.  1.  2] is alive (102.87 ms)
 +
    losangeles.voip.ms [ip:  96. 44.149.186] is alive ( 64.92 ms)
 +
    losangeles2.voip.ms [ip:  96. 44.149.202] is alive ( 63.41 ms)
 +
        newyork.voip.ms [ip:  74. 63. 41.218] is alive (131.75 ms)
 +
      newyork2.voip.ms [ip: 107.  6. 67.236] is alive (120.64 ms)
 +
      newyork3.voip.ms [ip: 107.  6. 67.237] is alive (120.49 ms)
 +
      newyork4.voip.ms [ip: 107.  6. 67.238] is alive (111.43 ms)
 +
        seattle.voip.ms [ip:  50. 23.160. 50] is alive ( 94.25 ms)
 +
      seattle2.voip.ms [ip:  50. 23.160. 51] is alive ( 95.86 ms)
 +
      seattle3.voip.ms [ip:  50. 23.160. 52] is alive ( 90.85 ms)
 +
          tampa.voip.ms [ip:  68.233.226. 97] is alive (123.29 ms)
 +
    washington.voip.ms [ip: 208. 43.234.226] is alive ( 98.71 ms)
 +
    washington2.voip.ms [ip: 208. 43.234.227] is alive (101.19 ms)
 +
      montreal.voip.ms [ip:  67.205. 74.184] is alive ( 81.82 ms)
 +
      montreal2.voip.ms [ip:  67.205. 74.187] is alive ( 86.13 ms)
 +
      montreal3.voip.ms [ip:  72. 55.168. 18] is alive ( 77.09 ms)
 +
      montreal4.voip.ms [ip:  67.205. 74.179] is alive ( 96.18 ms)
 +
      toronto2.voip.ms [ip: 184. 75.215.114] is alive (103.70 ms)
 +
      toronto3.voip.ms [ip: 184. 75.215.146] is alive (131.27 ms)
 +
      toronto4.voip.ms [ip: 184. 75.213.210] is alive (125.13 ms)
 +
        toronto.voip.ms [ip: 184. 75.215.106] is alive (103.26 ms)
 +
        london.voip.ms [ip:  5. 77. 36.136] is alive (152.77 ms)
 +
   
 +
    Round 2
 +
        atlanta.voip.ms [ip: 174. 34.146.162] is alive ( 88.14 ms)
 +
      atlanta2.voip.ms [ip:  72.  9.246.170] is alive ( 92.86 ms)
 +
        chicago.voip.ms [ip: 208.100. 39. 52] is alive ( 50.03 ms)
 +
      chicago2.voip.ms [ip: 208.100. 39. 53] is alive ( 59.44 ms)
 +
      chicago3.voip.ms [ip: 208.100. 39. 54] is alive ( 59.33 ms)
 +
      chicago4.voip.ms [ip: 208.100. 39. 55] is alive ( 50.22 ms)
 +
        dallas.voip.ms [ip:  74. 54. 54.178] is alive ( 95.58 ms)
 +
        denver.voip.ms [ip: 173.248.161. 90] is alive ( 95.94 ms)
 +
        denver2.voip.ms [ip: 173.248.159.210] is alive ( 85.29 ms)
 +
        houston.voip.ms [ip: 209. 62.  1.  2] is alive (102.73 ms)
 +
    losangeles.voip.ms [ip:  96. 44.149.186] is alive ( 65.59 ms)
 +
    losangeles2.voip.ms [ip:  96. 44.149.202] is alive ( 64.27 ms)
 +
        newyork.voip.ms [ip:  74. 63. 41.218] is alive (112.74 ms)
 +
      newyork2.voip.ms [ip: 107.  6. 67.236] is alive (121.22 ms)
 +
      newyork3.voip.ms [ip: 107.  6. 67.237] is alive (121.34 ms)
 +
      newyork4.voip.ms [ip: 107.  6. 67.238] is alive (110.75 ms)
 +
        seattle.voip.ms [ip:  50. 23.160. 50] is alive ( 94.06 ms)
 +
      seattle2.voip.ms [ip:  50. 23.160. 51] is alive ( 95.33 ms)
 +
      seattle3.voip.ms [ip:  50. 23.160. 52] is alive ( 91.58 ms)
 +
          tampa.voip.ms [ip:  68.233.226. 97] is alive (122.94 ms)
 +
    washington.voip.ms [ip: 208. 43.234.226] is alive ( 98.28 ms)
 +
    washington2.voip.ms [ip: 208. 43.234.227] is alive (101.40 ms)
 +
      montreal.voip.ms [ip:  67.205. 74.184] is alive ( 81.91 ms)
 +
      montreal2.voip.ms [ip:  67.205. 74.187] is alive ( 85.64 ms)
 +
      montreal3.voip.ms [ip:  72. 55.168. 18] is alive ( 75.15 ms)
 +
      montreal4.voip.ms [ip:  67.205. 74.179] is alive ( 96.79 ms)
 +
      toronto2.voip.ms [ip: 184. 75.215.114] is alive (103.10 ms)
 +
      toronto3.voip.ms [ip: 184. 75.215.146] is alive (150.85 ms)
 +
      toronto4.voip.ms [ip: 184. 75.213.210] is alive (138.40 ms)
 +
        toronto.voip.ms [ip: 184. 75.215.106] is alive (103.45 ms)
 +
        london.voip.ms [ip:  5. 77. 36.136] is alive (170.79 ms)
 +
   
 +
    Round 3
 +
        atlanta.voip.ms [ip: 174. 34.146.162] is alive ( 88.76 ms)
 +
      atlanta2.voip.ms [ip:  72.  9.246.170] is alive ( 92.86 ms)
 +
        chicago.voip.ms [ip: 208.100. 39. 52] is alive ( 49.65 ms)
 +
      chicago2.voip.ms [ip: 208.100. 39. 53] is alive ( 60.01 ms)
 +
      chicago3.voip.ms [ip: 208.100. 39. 54] is alive ( 59.05 ms)
 +
      chicago4.voip.ms [ip: 208.100. 39. 55] is alive ( 49.53 ms)
 +
        dallas.voip.ms [ip:  74. 54. 54.178] is alive ( 95.82 ms)
 +
        denver.voip.ms [ip: 173.248.161. 90] is alive ( 95.02 ms)
 +
        denver2.voip.ms [ip: 173.248.159.210] is alive ( 85.60 ms)
 +
        houston.voip.ms [ip: 209. 62.  1.  2] is alive (103.35 ms)
 +
    losangeles.voip.ms [ip:  96. 44.149.186] is alive ( 65.79 ms)
 +
    losangeles2.voip.ms [ip:  96. 44.149.202] is alive ( 64.05 ms)
 +
        newyork.voip.ms [ip:  74. 63. 41.218] is alive (113.01 ms)
 +
      newyork2.voip.ms [ip: 107.  6. 67.236] is alive (121.41 ms)
 +
      newyork3.voip.ms [ip: 107.  6. 67.237] is alive (122.23 ms)
 +
      newyork4.voip.ms [ip: 107.  6. 67.238] is alive (110.62 ms)
 +
        seattle.voip.ms [ip:  50. 23.160. 50] is alive ( 93.65 ms)
 +
      seattle2.voip.ms [ip:  50. 23.160. 51] is alive ( 95.19 ms)
 +
      seattle3.voip.ms [ip:  50. 23.160. 52] is alive ( 90.75 ms)
 +
          tampa.voip.ms [ip:  68.233.226. 97] is alive (125.12 ms)
 +
    washington.voip.ms [ip: 208. 43.234.226] is alive ( 98.19 ms)
 +
    washington2.voip.ms [ip: 208. 43.234.227] is alive (101.98 ms)
 +
      montreal.voip.ms [ip:  67.205. 74.184] is alive ( 80.16 ms)
 +
      montreal2.voip.ms [ip:  67.205. 74.187] is alive ( 87.16 ms)
 +
      montreal3.voip.ms [ip:  72. 55.168. 18] is alive ( 76.54 ms)
 +
      montreal4.voip.ms [ip:  67.205. 74.179] is alive ( 97.51 ms)
 +
      toronto2.voip.ms [ip: 184. 75.215.114] is alive (104.18 ms)
 +
      toronto3.voip.ms [ip: 184. 75.215.146] is alive (142.81 ms)
 +
      toronto4.voip.ms [ip: 184. 75.213.210] is alive (138.95 ms)
 +
        toronto.voip.ms [ip: 184. 75.215.106] is alive (103.78 ms)
 +
        london.voip.ms [ip:  5. 77. 36.136] is alive (153.14 ms)
 +
   
 +
    Round 4
 +
        atlanta.voip.ms [ip: 174. 34.146.162] is alive ( 89.19 ms)
 +
      atlanta2.voip.ms [ip:  72.  9.246.170] is alive ( 92.98 ms)
 +
        chicago.voip.ms [ip: 208.100. 39. 52] is alive ( 49.21 ms)
 +
      chicago2.voip.ms [ip: 208.100. 39. 53] is alive ( 60.50 ms)
 +
      chicago3.voip.ms [ip: 208.100. 39. 54] is alive ( 59.68 ms)
 +
      chicago4.voip.ms [ip: 208.100. 39. 55] is alive ( 50.18 ms)
 +
        dallas.voip.ms [ip:  74. 54. 54.178] is alive ( 93.93 ms)
 +
        denver.voip.ms [ip: 173.248.161. 90] is alive ( 94.22 ms)
 +
        denver2.voip.ms [ip: 173.248.159.210] is alive ( 85.10 ms)
 +
        houston.voip.ms [ip: 209. 62.  1.  2] is alive (103.67 ms)
 +
    losangeles.voip.ms [ip:  96. 44.149.186] is alive ( 65.58 ms)
 +
    losangeles2.voip.ms [ip:  96. 44.149.202] is alive ( 63.60 ms)
 +
        newyork.voip.ms [ip:  74. 63. 41.218] is alive (114.76 ms)
 +
      newyork2.voip.ms [ip: 107.  6. 67.236] is alive (120.44 ms)
 +
      newyork3.voip.ms [ip: 107.  6. 67.237] is alive (121.05 ms)
 +
      newyork4.voip.ms [ip: 107.  6. 67.238] is alive (110.51 ms)
 +
        seattle.voip.ms [ip:  50. 23.160. 50] is alive ( 94.04 ms)
 +
      seattle2.voip.ms [ip:  50. 23.160. 51] is alive ( 96.92 ms)
 +
      seattle3.voip.ms [ip:  50. 23.160. 52] is alive ( 91.23 ms)
 +
          tampa.voip.ms [ip:  68.233.226. 97] is alive (123.28 ms)
 +
    washington.voip.ms [ip: 208. 43.234.226] is alive ( 98.45 ms)
 +
    washington2.voip.ms [ip: 208. 43.234.227] is alive (100.94 ms)
 +
      montreal.voip.ms [ip:  67.205. 74.184] is alive ( 82.33 ms)
 +
      montreal2.voip.ms [ip:  67.205. 74.187] is alive ( 85.02 ms)
 +
      montreal3.voip.ms [ip:  72. 55.168. 18] is alive ( 76.85 ms)
 +
      montreal4.voip.ms [ip:  67.205. 74.179] is alive ( 96.32 ms)
 +
      toronto2.voip.ms [ip: 184. 75.215.114] is alive (104.22 ms)
 +
      toronto3.voip.ms [ip: 184. 75.215.146] is alive (148.33 ms)
 +
      toronto4.voip.ms [ip: 184. 75.213.210] is alive (141.61 ms)
 +
        toronto.voip.ms [ip: 184. 75.215.106] is alive (105.91 ms)
 +
        london.voip.ms [ip:  5. 77. 36.136] is alive (152.85 ms)
 +
   
 +
    Server              Average (ms)
 +
    atlanta.voip.ms      88.7630
 +
    atlanta2.voip.ms      92.9233
 +
    chicago.voip.ms      49.6477
 +
    chicago2.voip.ms      59.9305
 +
    chicago3.voip.ms      59.3972
 +
    chicago4.voip.ms      49.9152
 +
    dallas.voip.ms        95.0790
 +
    denver.voip.ms        94.8077
 +
    denver2.voip.ms      85.2797
 +
    houston.voip.ms      103.1562
 +
    losangeles.voip.ms    65.4693
 +
    losangeles2.voip.ms  63.8347
 +
    newyork.voip.ms      118.0643
 +
    newyork2.voip.ms    120.9265
 +
    newyork3.voip.ms    121.2778
 +
    newyork4.voip.ms    110.8275
 +
    seattle.voip.ms      93.9993
 +
    seattle2.voip.ms      95.8267
 +
    seattle3.voip.ms      91.1035
 +
    tampa.voip.ms        123.6570
 +
    washington.voip.ms    98.4065
 +
    washington2.voip.ms  101.3774
 +
    montreal.voip.ms      81.5525
 +
    montreal2.voip.ms    85.9863
 +
    montreal3.voip.ms    76.4058
 +
    montreal4.voip.ms    96.7013
 +
    toronto2.voip.ms    103.7986
 +
    toronto3.voip.ms    143.3156
 +
    toronto4.voip.ms    136.0254
 +
    toronto.voip.ms      104.1012
 +
    london.voip.ms      157.3885
 +
 
 +
=== Powershell ===
 +
 
 +
Dec 2017 - A bug in the code shown washington2.voip.ms as the best server, this was corrected.
 +
 
 +
<pre>
 +
# Usage: Copy and paste the following code into a powershell window
 +
# To run it from a command prompt, save this file with extension ps1.
 +
# Then run Powershell.exe -file "pathtothisscript.ps1"
 +
Clear-Variable best* -Scope Global #Clear the best* variables in case you run it more than once...
 +
#Get the list of servers into an array
 +
$Servers =     
 +
@("amsterdam.voip.ms","atlanta.voip.ms","atlanta2.voip.ms","chicago.voip.ms","chicago2.voip.ms","chicago3.voip.ms",
 +
"chicago4.voip.ms","dallas.voip.ms","dallas2.voip.ms","denver.voip.ms","denver2.voip.ms","houston.voip.ms",
 +
"houston2.voip.ms","london.voip.ms","losangeles.voip.ms","losangeles2.voip.ms","melbourne.voip.ms","montreal.voip.ms",
 +
"montreal2.voip.ms","montreal3.voip.ms","montreal4.voip.ms","montreal5.voip.ms","montreal6.voip.ms","montreal7.voip.ms",
 +
"montreal8.voip.ms","newyork.voip.ms","newyork2.voip.ms","newyork3.voip.ms","newyork4.voip.ms","newyork5.voip.ms",
 +
"newyork6.voip.ms","newyork7.voip.ms","newyork8.voip.ms","paris.voip.ms","sanjose.voip.ms","sanjose2.voip.ms",
 +
"seattle.voip.ms","seattle2.voip.ms","seattle3.voip.ms","tampa.voip.ms","tampa2.voip.ms","toronto.voip.ms",
 +
"toronto2.voip.ms","toronto3.voip.ms","toronto4.voip.ms","toronto5.voip.ms","toronto6.voip.ms","toronto7.voip.ms",
 +
"toronto8.voip.ms","vancouver.voip.ms","vancouver2.voip.ms","washington.voip.ms","washington2.voip.ms")
 +
$k = 0 #Counting variable so we know what server number we are testing
 +
#num of servers to test
 +
$servercount = $servers.length
 +
#Do the following code for each server in our array
 +
ForEach($server in $servers)
 +
{ 
 +
  #Add one to the counting variable....we are on server #1...then server 2, then server 3 etc...
 +
  $k++
 +
  #Update the progress bar                   
 +
  Write-Progress -Activity "Testing Server: ${server}" -status "Testing Server $k out of $servercount" -percentComplete ($k / $servercount*100)
 +
  #Counting variable for number of times we tried to ping a given server
 +
  $i = 0
 +
  Do{
 +
    #assume a failure
 +
    $pingsuccess = $false
 +
    $i++ #Add one to the counting variable.....1st try....2nd try....3rd try etc...
 +
    Try{
 +
        #Try to ping
 +
        $currentping = (test-connection $server -count 1 -ErrorAction Stop).responsetime
 +
        #If success full, set success variable
 +
        $pingsuccess = $true
 +
    }
 +
    #Catch the failure and set the success variable to false
 +
    Catch {
 +
      $pingsuccess = $false
 +
      }   
 +
  }
 +
  #Try everything between Do and While up to 5 times, or while $pingsuccess is not true
 +
  While($pingsuccess -eq $false -and $i -le 5)
 +
  #Compare the last ping test with the best known ping test....if there is no known best ping test, assume this one is the best $bestping = $currentping
 +
  If($pingsuccess -and ($currentping -lt $bestping -or (!($bestping)))){
 +
  #If this is the best ping...save it
 +
        $bestserver = $server    #Save the best server
 +
        $bestping = $currentping #Save the best ping results
 +
  }
 +
  write-host "tested: $server at $currentping ms after $i attempts" #write the results of the test for this server
 +
}
 +
write-host "`r`n The server with the best ping is: $bestserver at $bestping ms`r`n" #write the end result
 +
Pause
 +
</pre>
 +
 
 +
=== Linux Shell Script ===
 +
Pings several voip.ms servers
 +
 
 +
  #!/bin/sh
 +
  # Ping several servers and display Latency, Jitter and Packet Loss
 +
  #
 +
  # First, create a text file with all servers you want to ping - one host name per line.
 +
  # The list of voip.ms servers is available at http://wiki.voip.ms/article/Choosing_Server
 +
  myHF="voip_ping_hosts.txt"
 +
  # Sample file:
 +
  #    toronto.voip.ms
 +
  #    montreal.voip.ms
 +
  #    seattle.voip.ms
 +
  #    chicago.voip.ms
 +
  #    newyork.voip.ms
 +
  #
 +
  echo "============================================"
 +
  printf "%-20s %7s %8s %6s\n" "VoIP Server" "Latency" "Jitter" "Loss"
 +
  echo "============================================"
 +
  cat ${myHF} |\
 +
  while read myLn
 +
  do
 +
      ping -c 3 -i 5 -q $myLn |\
 +
      awk '/^PING / {myH=$2}
 +
          /packet loss/ {myPL=$6}
 +
          /min\/avg\/max/ {
 +
              split($4,myS,"/")
 +
              printf( "%-20s    %3.1f    %1.3f  %4s\n", myH, myS[2], myS[4], myPL)
 +
          }'
 +
  done
 +
  echo "============================================"
 +
 
 +
Output:
 +
 
 +
  ============================================
 +
  VoIP Server          Latency  Jitter  Loss
 +
  ============================================
 +
  toronto.voip.ms        68.3    0.439    0%
 +
  montreal.voip.ms        89.6    0.197    0%
 +
  seattle.voip.ms        71.2    0.387    0%
 +
  chicago.voip.ms        71.6    0.084    0%
 +
  newyork.voip.ms        79.1    0.411    0%
 +
  ============================================
 +
 
 +
= Latency and its importance =
 +
 
 +
Latency is very important for Voip, this will determine the time that will take for the data package transmission to reach the destination. A high latency will lead to a delay and echoes in the communication.
 +
 
 +
Latency is measured in milliseconds (ms) For example: a latency of 150ms is barely noticeable, thus acceptable. Higher than that, quality starts to suffer. When it gets higher than 300 ms, it becomes unacceptable.
[[category:guides]]
[[category:guides]]

Latest revision as of 18:55, 24 May 2018

Contents

Choosing a Server

VoIP.ms offers many different servers, but which one should you choose? One misconception is that you should pick the closest to your location, however this is not needed most of the time. For example, if you are in the USA, any of the US servers will provide a really good latency and service quality. The newest server within a city is indicated with the highest number attached to the name, as they are classified in ascending order. Also worth noting is that there is a network tool that will help you when deciding which server you want to use, generally named a "ping", which will provide you the latency between you and the server. Therefore the server which provides you less latency should be used.

Server Points of Presence

In the following links you will find a table with the server's information including their IP addresses.

Canada USA International
VoIP.ms servers

Server Realms

Please click here Server Realms to get the Realm Name for the server you plan on using, this can differ from the Domain Name being used. 

Please note that the following servers will not be available to select as a DID Point of Presence for newer accounts: 
Atlanta 1, Chicago 1, New York 1, New York 4, Seattle 1, Montreal 1, Montreal 2, Montreal 3, Montreal 4, Toronto, Toronto 2, Toronto 3, Toronto 4.

What is a Ping?

Ping is a standard tool used to test network connections. It is mostly used to determine if a server or device can be reached across the network and the latency of the response(the time it takes to send a packet to the destination and for it to return to your computer).

Ping tools are part of Windows, Mac OS X and Linux as well as some routers.

How does the ping work?

It sends request messages to a target network address or DNS names at periodic intervals and measures the time it takes for a response message to arrive and return(better known as latency).

How to ping on a PC

Pinging is a command which tells you if the connection between your computer and a particular domain is working correctly.

In Windows, select Start > Programs > Accessories > Command Prompt. This will give you a window like the one below.

Enter the word ping, followed by a space, then the domain name.(montreal.voip.ms) in this case domain is our server name.

If the results show a series of replies, the connection is working. The time shows you how fast the connection is. If you see a "timed out" error instead of a reply, there is a breakdown somewhere between your computer and the domain.

Ping

How to ping on a Mac Computer

1- Click on Finder in the dock.

2- Click on Applications.

3- Click on Utilities.

4- Double-click on Network Utility. *

* In OS X Mavericks (10.9.x) this utility app changed location. Launch it from spotlight instead, either press "command"+"space bar" or click on spotlight directly (magnifying glass icon at top right of screen), type "network utility" and hit "return"

5- In the Network Utility window, click on the Ping tab

6- In the field under "Please enter the network address to ping," like montreal.voip.ms


If pings results are not consistent, you may have an issue with Jitter. You can work on this issue by adjusting the "Network Jitter Level" setting on your VoIP device. Usually a ping of under 150 ms is recommended in order to have good quality. The latency time to the server is important, however there are also other factors that could affect the quality of the calls such as packet loss (VoIP communications are very sensitive to this), and the Jitter level of your Internet connection.

The following is the output of running ping with the target losangeles.voip.ms. 

#ping losangeles.voip.ms
Ping to losangeles.voip.ms [67.215.241.250] with 32 bytes de datos:
Response from 67.215.241.250: bytes=32 time=67ms TTL=52
Response from 67.215.241.250: bytes=32 time=69ms TTL=52
Response from 67.215.241.250: bytes=32 time=68ms TTL=52
Response from 67.215.241.250: bytes=32 time=67ms TTL=52
ping statistics from 67.215.241.250:
4 packets transmitted, 4 received, 0% packet lost. rtt min/avg/max/mdev = 67ms, 69ms, 67ms

Sample ping output in windows: 

C:\Windows\system32>ping montreal.voip.ms

Pinging montreal.voip.ms [67.205.74.184] with 32 bytes of data:
Reply from 67.205.74.184: bytes=32 time=85ms TTL=49
Reply from 67.205.74.184: bytes=32 time=86ms TTL=49
Reply from 67.205.74.184: bytes=32 time=86ms TTL=49
Reply from 67.205.74.184: bytes=32 time=85ms TTL=49

Ping statistics for 67.205.74.184:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 85ms, Maximum = 86ms, Average = 85ms


Latency Testing Scripts (User Submitted)

All the following scripts were produced by voip.ms users who felt others might also benefit from the output of their efforts. They were written over a span of Years and probably need adjusting before you use them, to cater for changes in servers over time and changes in policies (like not testing heavily subscribed servers which are not open to new registrations)

If you aren't satisfied that the scripts are safe or simply don’t like the way they syntactically appear, you can still manually ping a selection of servers and choose a server based on the best latency. The following scripts are essentially just wrappers around the ping command which support lists of servers to feed to ping and present the output in a readable format.

If you feel you have a simpler cleaner script that works for another platform or language, please do add it to this wiki via a support ticket.

Bash Script To Handle The Mac Ping Output Format

To make use of this script (1) save as a plain text file (2) set permissions on the file to executable (3) invoke script e.g. Save script below using your favourite editor as pingVoipMS.sh (2) chmod u+x pingVoipMS.sh (3) ./pingVoipMS.sh This is a bash 3.x script, so it also works in Linux, just change the ping packet loss field from 7 to 6 in the final loop below (or wherever the loss field is in your ping output format). Depending upon your distro curl might need to change to wget. 

#!/bin/bash
# Ping several servers and display Latency, Jitter and Packet Loss
#      Usage: [-c <count>][-i <wait time>][-r test restricted servers][<server list file>]
#
# The optional text file should be formatted with one host name per line.
# The list of voip.ms servers is available at http://wiki.voip.ms/article/Choosing_Server
# If no args are supplied, this script will scrape a ping server list from voip.ms
#
USER_FILE=""
COUNT=3; INTERVAL=5; RESTRICTED=0
restrictedList=(atlanta.voip.ms chicago.voip.ms
                montreal.voip.ms montreal2.voip.ms montreal3.voip.ms montreal4.voip.ms
                newyork.voip.ms newyork4.voip.ms seattle.voip.ms
                toronto.voip.ms toronto2.voip.ms toronto3.voip.ms toronto4.voip.ms)

# Handle any passed in script arguments
while getopts c:i:r parm
do
    case $parm in
        c)count_opt=$OPTARG;;
        i)interval_opt=$OPTARG;;
        r)RESTRICTED=1;;
        *)echo -e "Invalid arg\nUsage:\t[ -c <count of ECHO_REQUESTs to Tx, default 3> ] \
                  \n\t[ -i <wait time (s) between datagrams, default 5> ]                \
                  \n\t[ -r ] Include restricted servers in latency test                  \
                  \n\t[FILE <ping server list> ]";exit 1;;
    esac
done

# Test if an option was specified and whether it's a +ve non-zero integer
[[ -n $count_opt    && ($count_opt =~ ^[[:digit:]]+$)    && $count_opt -gt 0 ]]    && COUNT=$count_opt
[[ -n $interval_opt && ($interval_opt =~ ^[[:digit:]]+$) && $interval_opt -gt 0 ]] && INTERVAL=$interval_opt

shift $(($OPTIND -1))

# Validate supplied file (server list)
[[ -n $1 && !(-f $1 && -r $1) ]] && { echo "\"$1\" file does not exist or is not readable"; exit 1; }
[[ -n $1 && -f $1 && -r $1 ]] && USER_FILE="$1"

if [[ -n $USER_FILE ]]
then
# Bash 3.x in macOS does not support readarray, need to do cumbersome array loops instead
    while IFS= read -r line; do
        serverList+=( "$line" )
    done < <(grep -e '[[:alpha:]]*[[:alnum:]]\.voip\.ms' $USER_FILE | grep  -v '^\s*#' | awk NF)
else
# N.B. The script looks for the html boldface tags <b> </b> inside a bracket
# If the website alters and the parse fails, manually create the list and
# supply as a script arg (or perhaps update the parsing to work again :)
    while IFS= read -r line; do
        serverList+=( "$line" )
    done < <(curl --silent http://wiki.voip.ms/article/Choosing_Server | \
             grep '(<b>[[:alpha:]]*[[:alnum:]]\.voip\.ms</b>)'         | \
             tr "<>" " " | awk '{print $(NF-3)}'                         )
fi

# Newer voip.ms clients can't register onto these over-subscribed servers
# Don't test the restricted list unless explicitly asked (with the -r cmd line option)
if [[ $RESTRICTED -eq 0 ]]
then
    for server in ${restrictedList[@]}
    do
        ix=$(printf "%s\n" "${serverList[@]}" | grep -n "^${server}" | cut -d ":" -f1)

        while IFS= read -r idx; do
            keys+=($idx)
        done < <([[ $ix -gt 0 ]] && echo $((ix-1)))
    done
    for ((i=${#keys[@]} - 1; i >= 0; i--)); do unset serverList[keys[i]]; done
fi

if [[ ${#serverList[@]} -eq 0 ]]
then
    echo "No unrestricted Voip.ms servers could be found, please supply a server list"
    exit 1
fi

runTime=$(( $COUNT * $INTERVAL * ${#serverList[@]} ))

echo "PING will send $COUNT packet(s) with a wait of $INTERVAL sec(s) between each packet"
echo "Change the PING options by invoking this script with -c and/or -i, default \"-c 3 -i 5\""
echo "Over $((${#serverList[@]})) server(s) the estimated script Run Time will be $runTime seconds"
echo "================================================================"
printf "%-20s %-18s %7s %8s %6s   %s\n" "VoIP Server" "IP Address" "Latency" "Jitter" "Loss" "Countdown"
echo "================================================================  (seconds)"

for myLn in ${serverList[@]}
do
     while IFS=$'\n' read -r line; do
         pingList+=( "$line" )
         printf "%-64s %5d   %2d/%-2d\n" "$line" "$((runTime - $COUNT * $INTERVAL * ${#pingList[@]}))" "${#pingList[@]}" "${#serverList[@]}"
     done < <( ping -c $COUNT -i $INTERVAL -q $myLn | awk '\
        /^PING / {myH=$2}
        /^PING / {
            IP = substr($3,2,15)
            split(IP,myIP,")") }
        /packet loss/ {myPL=$7}
        /min\/avg\/max/ {
            split($4,myS,"/")
            printf("%-20s %-18s %7.3f %8.3f %6s\n",
                    myH, myIP[1], myS[2], myS[4], myPL ) }
    ' )
done

echo "================================================================"
echo -e "\nMost appropriate server listed in order of best latency\n"
echo "================================================================"
printf "%-20s %-18s %7s %8s %6s\n" "VoIP Server" "IP Address" "Latency" "Jitter" "Loss"
echo "================================================================"
printf "%s\n" "${pingList[@]}" | LC_ALL=C sort -n -k 3,3 -k 5,5 -k 4,4 | awk '{printf("%s    \(%2d\)\n",$0, NR)}'
echo "================================================================"

Perl Script

Pings list of voip.ms servers round robin with optional output csv file. 

   # usage ping_voip.ms.pl <number of times> <seconds in between> <output.csv>
   use Net::Ping;
   use Time::HiRes;
   use strict;
   
   # input list 
   my @hosts = qw(
       atlanta.voip.ms
       atlanta2.voip.ms
       chicago.voip.ms
       chicago2.voip.ms
       chicago3.voip.ms
       chicago4.voip.ms
       dallas.voip.ms
       denver.voip.ms
       denver2.voip.ms
       houston.voip.ms
       losangeles.voip.ms
       losangeles2.voip.ms
       newyork.voip.ms
       newyork2.voip.ms
       newyork3.voip.ms
       newyork4.voip.ms
       seattle.voip.ms
       seattle2.voip.ms
       seattle3.voip.ms
       tampa.voip.ms
       washington.voip.ms
       washington2.voip.ms
       montreal.voip.ms
       montreal2.voip.ms
       montreal3.voip.ms
       montreal4.voip.ms
       toronto2.voip.ms
       toronto3.voip.ms
       toronto4.voip.ms
       toronto.voip.ms
       london.voip.ms
   );
   
   $| = 1; #autoflush
   # High precision syntax (requires Time::HiRes)
   my $p = Net::Ping->new("icmp",1);
   $p->hires();
   my $max_name_length = (reverse sort { $a <=> $b } map { length($_) } @hosts)[0];
   my $count = 4; # number of times to ping
   my $interval = 5; # seconds between ping rounds
   my $output_file = "";
   my @data;
   
   # check for arguments
   my $num_args = @ARGV;
   if ($num_args >= 1) {$count = $ARGV[0];}
   if ($num_args >= 2) {$interval = $ARGV[1];}
   if ($num_args >= 3) {$output_file = $ARGV[2];}
   
   # check argument validity
   $0 =~ /^.*\\(.*)$/;
   my $script = $1;
   if ($count !~ /^\d+$/ or $interval !~ /^\d+$/) {die "Usage: $script <number of rounds> <seconds between rounds> <output.csv>\n";}
   if (length($output_file) > 0 and $output_file !~ /\.csv$/) {$output_file .= ".csv";}
   
   # main loop
   for my $i (1..$count)
   {
       sleep $interval unless $i == 1;
       print "Round $i\n";
       my $host_num=0;
       foreach my $host (@hosts)
       {
           (my $ret, my $duration, my $ip) = $p->ping($host);
           $ip =~ /(\d+)\.(\d+)\.(\d+)\.(\d+)/; 
           if ($ret)
           {
               printf("%*s [ip: %3s.%3s.%3s.%3s] is alive (%6.2f ms)\n", $max_name_length, $host, $1, $2, $3, $4, $duration*1000);
               $data[$host_num][$i]=$duration*1000;
           }
           else
           {
               printf("%*s [ip: %3s.%3s.%3s.%3s] is dead\n", $max_name_length, $host, $1, $2, $3, $4);
           }
           $host_num++;
       }
       print "\n";
   }
   $p->close();
   
   # if output file name given
   if (length($output_file)>0)
   {
       # print output to file
       open FILE, ">$output_file" or die "$!\n";
       
       # print column headers
       print FILE "Server\\Round";
       for my $i (1..$count)
       {
           print FILE ", $i";
       }
       print FILE ", Average\n";
       
       # print data
       my $i = 0;
       foreach my $host (@hosts)
       {
           print FILE "$host";
           my $sum = 0;
           for my $j (1..$count)
           {
               $sum += $data[$i][$j];
               printf FILE ", %8.4f",$data[$i][$j];
           }
           printf FILE ", %8.4f\n",$sum/$count;
           $i++;
       }
       
       close FILE;
       print "Data written to $output_file\n";
   }
   
   # print summary to screen
   my $i = 0;
   printf("%-*s Average (ms)\n", $max_name_length, "Server");
   foreach my $host (@hosts)
   {
       my $sum = 0;
       for my $j (1..$count)
       {
           $sum += $data[$i][$j];
       }
       printf("%-*s %8.4f\n", $max_name_length+1, $host, $sum/$count);
       $i++;
   }


Output: 

   Round 1
       atlanta.voip.ms [ip: 174. 34.146.162] is alive ( 88.97 ms)
      atlanta2.voip.ms [ip:  72.  9.246.170] is alive ( 92.99 ms)
       chicago.voip.ms [ip: 208.100. 39. 52] is alive ( 49.70 ms)
      chicago2.voip.ms [ip: 208.100. 39. 53] is alive ( 59.76 ms)
      chicago3.voip.ms [ip: 208.100. 39. 54] is alive ( 59.53 ms)
      chicago4.voip.ms [ip: 208.100. 39. 55] is alive ( 49.73 ms)
        dallas.voip.ms [ip:  74. 54. 54.178] is alive ( 94.99 ms)
        denver.voip.ms [ip: 173.248.161. 90] is alive ( 94.05 ms)
       denver2.voip.ms [ip: 173.248.159.210] is alive ( 85.13 ms)
       houston.voip.ms [ip: 209. 62.  1.  2] is alive (102.87 ms)
    losangeles.voip.ms [ip:  96. 44.149.186] is alive ( 64.92 ms)
   losangeles2.voip.ms [ip:  96. 44.149.202] is alive ( 63.41 ms)
       newyork.voip.ms [ip:  74. 63. 41.218] is alive (131.75 ms)
      newyork2.voip.ms [ip: 107.  6. 67.236] is alive (120.64 ms)
      newyork3.voip.ms [ip: 107.  6. 67.237] is alive (120.49 ms)
      newyork4.voip.ms [ip: 107.  6. 67.238] is alive (111.43 ms)
       seattle.voip.ms [ip:  50. 23.160. 50] is alive ( 94.25 ms)
      seattle2.voip.ms [ip:  50. 23.160. 51] is alive ( 95.86 ms)
      seattle3.voip.ms [ip:  50. 23.160. 52] is alive ( 90.85 ms)
         tampa.voip.ms [ip:  68.233.226. 97] is alive (123.29 ms)
    washington.voip.ms [ip: 208. 43.234.226] is alive ( 98.71 ms)
   washington2.voip.ms [ip: 208. 43.234.227] is alive (101.19 ms)
      montreal.voip.ms [ip:  67.205. 74.184] is alive ( 81.82 ms)
     montreal2.voip.ms [ip:  67.205. 74.187] is alive ( 86.13 ms)
     montreal3.voip.ms [ip:  72. 55.168. 18] is alive ( 77.09 ms)
     montreal4.voip.ms [ip:  67.205. 74.179] is alive ( 96.18 ms)
      toronto2.voip.ms [ip: 184. 75.215.114] is alive (103.70 ms)
      toronto3.voip.ms [ip: 184. 75.215.146] is alive (131.27 ms)
      toronto4.voip.ms [ip: 184. 75.213.210] is alive (125.13 ms)
       toronto.voip.ms [ip: 184. 75.215.106] is alive (103.26 ms)
        london.voip.ms [ip:   5. 77. 36.136] is alive (152.77 ms)
   
   Round 2
       atlanta.voip.ms [ip: 174. 34.146.162] is alive ( 88.14 ms)
      atlanta2.voip.ms [ip:  72.  9.246.170] is alive ( 92.86 ms)
       chicago.voip.ms [ip: 208.100. 39. 52] is alive ( 50.03 ms)
      chicago2.voip.ms [ip: 208.100. 39. 53] is alive ( 59.44 ms)
      chicago3.voip.ms [ip: 208.100. 39. 54] is alive ( 59.33 ms)
      chicago4.voip.ms [ip: 208.100. 39. 55] is alive ( 50.22 ms)
        dallas.voip.ms [ip:  74. 54. 54.178] is alive ( 95.58 ms)
        denver.voip.ms [ip: 173.248.161. 90] is alive ( 95.94 ms)
       denver2.voip.ms [ip: 173.248.159.210] is alive ( 85.29 ms)
       houston.voip.ms [ip: 209. 62.  1.  2] is alive (102.73 ms)
    losangeles.voip.ms [ip:  96. 44.149.186] is alive ( 65.59 ms)
   losangeles2.voip.ms [ip:  96. 44.149.202] is alive ( 64.27 ms)
       newyork.voip.ms [ip:  74. 63. 41.218] is alive (112.74 ms)
      newyork2.voip.ms [ip: 107.  6. 67.236] is alive (121.22 ms)
      newyork3.voip.ms [ip: 107.  6. 67.237] is alive (121.34 ms)
      newyork4.voip.ms [ip: 107.  6. 67.238] is alive (110.75 ms)
       seattle.voip.ms [ip:  50. 23.160. 50] is alive ( 94.06 ms)
      seattle2.voip.ms [ip:  50. 23.160. 51] is alive ( 95.33 ms)
      seattle3.voip.ms [ip:  50. 23.160. 52] is alive ( 91.58 ms)
         tampa.voip.ms [ip:  68.233.226. 97] is alive (122.94 ms)
    washington.voip.ms [ip: 208. 43.234.226] is alive ( 98.28 ms)
   washington2.voip.ms [ip: 208. 43.234.227] is alive (101.40 ms)
      montreal.voip.ms [ip:  67.205. 74.184] is alive ( 81.91 ms)
     montreal2.voip.ms [ip:  67.205. 74.187] is alive ( 85.64 ms)
     montreal3.voip.ms [ip:  72. 55.168. 18] is alive ( 75.15 ms)
     montreal4.voip.ms [ip:  67.205. 74.179] is alive ( 96.79 ms)
      toronto2.voip.ms [ip: 184. 75.215.114] is alive (103.10 ms)
      toronto3.voip.ms [ip: 184. 75.215.146] is alive (150.85 ms)
      toronto4.voip.ms [ip: 184. 75.213.210] is alive (138.40 ms)
       toronto.voip.ms [ip: 184. 75.215.106] is alive (103.45 ms)
        london.voip.ms [ip:   5. 77. 36.136] is alive (170.79 ms)
   
   Round 3
       atlanta.voip.ms [ip: 174. 34.146.162] is alive ( 88.76 ms)
      atlanta2.voip.ms [ip:  72.  9.246.170] is alive ( 92.86 ms)
       chicago.voip.ms [ip: 208.100. 39. 52] is alive ( 49.65 ms)
      chicago2.voip.ms [ip: 208.100. 39. 53] is alive ( 60.01 ms)
      chicago3.voip.ms [ip: 208.100. 39. 54] is alive ( 59.05 ms)
      chicago4.voip.ms [ip: 208.100. 39. 55] is alive ( 49.53 ms)
        dallas.voip.ms [ip:  74. 54. 54.178] is alive ( 95.82 ms)
        denver.voip.ms [ip: 173.248.161. 90] is alive ( 95.02 ms)
       denver2.voip.ms [ip: 173.248.159.210] is alive ( 85.60 ms)
       houston.voip.ms [ip: 209. 62.  1.  2] is alive (103.35 ms)
    losangeles.voip.ms [ip:  96. 44.149.186] is alive ( 65.79 ms)
   losangeles2.voip.ms [ip:  96. 44.149.202] is alive ( 64.05 ms)
       newyork.voip.ms [ip:  74. 63. 41.218] is alive (113.01 ms)
      newyork2.voip.ms [ip: 107.  6. 67.236] is alive (121.41 ms)
      newyork3.voip.ms [ip: 107.  6. 67.237] is alive (122.23 ms)
      newyork4.voip.ms [ip: 107.  6. 67.238] is alive (110.62 ms)
       seattle.voip.ms [ip:  50. 23.160. 50] is alive ( 93.65 ms)
      seattle2.voip.ms [ip:  50. 23.160. 51] is alive ( 95.19 ms)
      seattle3.voip.ms [ip:  50. 23.160. 52] is alive ( 90.75 ms)
         tampa.voip.ms [ip:  68.233.226. 97] is alive (125.12 ms)
    washington.voip.ms [ip: 208. 43.234.226] is alive ( 98.19 ms)
   washington2.voip.ms [ip: 208. 43.234.227] is alive (101.98 ms)
      montreal.voip.ms [ip:  67.205. 74.184] is alive ( 80.16 ms)
     montreal2.voip.ms [ip:  67.205. 74.187] is alive ( 87.16 ms)
     montreal3.voip.ms [ip:  72. 55.168. 18] is alive ( 76.54 ms)
     montreal4.voip.ms [ip:  67.205. 74.179] is alive ( 97.51 ms)
      toronto2.voip.ms [ip: 184. 75.215.114] is alive (104.18 ms)
      toronto3.voip.ms [ip: 184. 75.215.146] is alive (142.81 ms)
      toronto4.voip.ms [ip: 184. 75.213.210] is alive (138.95 ms)
       toronto.voip.ms [ip: 184. 75.215.106] is alive (103.78 ms)
        london.voip.ms [ip:   5. 77. 36.136] is alive (153.14 ms)
   
   Round 4
       atlanta.voip.ms [ip: 174. 34.146.162] is alive ( 89.19 ms)
      atlanta2.voip.ms [ip:  72.  9.246.170] is alive ( 92.98 ms)
       chicago.voip.ms [ip: 208.100. 39. 52] is alive ( 49.21 ms)
      chicago2.voip.ms [ip: 208.100. 39. 53] is alive ( 60.50 ms)
      chicago3.voip.ms [ip: 208.100. 39. 54] is alive ( 59.68 ms)
      chicago4.voip.ms [ip: 208.100. 39. 55] is alive ( 50.18 ms)
        dallas.voip.ms [ip:  74. 54. 54.178] is alive ( 93.93 ms)
        denver.voip.ms [ip: 173.248.161. 90] is alive ( 94.22 ms)
       denver2.voip.ms [ip: 173.248.159.210] is alive ( 85.10 ms)
       houston.voip.ms [ip: 209. 62.  1.  2] is alive (103.67 ms)
    losangeles.voip.ms [ip:  96. 44.149.186] is alive ( 65.58 ms)
   losangeles2.voip.ms [ip:  96. 44.149.202] is alive ( 63.60 ms)
       newyork.voip.ms [ip:  74. 63. 41.218] is alive (114.76 ms)
      newyork2.voip.ms [ip: 107.  6. 67.236] is alive (120.44 ms)
      newyork3.voip.ms [ip: 107.  6. 67.237] is alive (121.05 ms)
      newyork4.voip.ms [ip: 107.  6. 67.238] is alive (110.51 ms)
       seattle.voip.ms [ip:  50. 23.160. 50] is alive ( 94.04 ms)
      seattle2.voip.ms [ip:  50. 23.160. 51] is alive ( 96.92 ms)
      seattle3.voip.ms [ip:  50. 23.160. 52] is alive ( 91.23 ms)
         tampa.voip.ms [ip:  68.233.226. 97] is alive (123.28 ms)
    washington.voip.ms [ip: 208. 43.234.226] is alive ( 98.45 ms)
   washington2.voip.ms [ip: 208. 43.234.227] is alive (100.94 ms)
      montreal.voip.ms [ip:  67.205. 74.184] is alive ( 82.33 ms)
     montreal2.voip.ms [ip:  67.205. 74.187] is alive ( 85.02 ms)
     montreal3.voip.ms [ip:  72. 55.168. 18] is alive ( 76.85 ms)
     montreal4.voip.ms [ip:  67.205. 74.179] is alive ( 96.32 ms)
      toronto2.voip.ms [ip: 184. 75.215.114] is alive (104.22 ms)
      toronto3.voip.ms [ip: 184. 75.215.146] is alive (148.33 ms)
      toronto4.voip.ms [ip: 184. 75.213.210] is alive (141.61 ms)
       toronto.voip.ms [ip: 184. 75.215.106] is alive (105.91 ms)
        london.voip.ms [ip:   5. 77. 36.136] is alive (152.85 ms)
   
   Server              Average (ms)
   atlanta.voip.ms       88.7630
   atlanta2.voip.ms      92.9233
   chicago.voip.ms       49.6477
   chicago2.voip.ms      59.9305
   chicago3.voip.ms      59.3972
   chicago4.voip.ms      49.9152
   dallas.voip.ms        95.0790
   denver.voip.ms        94.8077
   denver2.voip.ms       85.2797
   houston.voip.ms      103.1562
   losangeles.voip.ms    65.4693
   losangeles2.voip.ms   63.8347
   newyork.voip.ms      118.0643
   newyork2.voip.ms     120.9265
   newyork3.voip.ms     121.2778
   newyork4.voip.ms     110.8275
   seattle.voip.ms       93.9993
   seattle2.voip.ms      95.8267
   seattle3.voip.ms      91.1035
   tampa.voip.ms        123.6570
   washington.voip.ms    98.4065
   washington2.voip.ms  101.3774
   montreal.voip.ms      81.5525
   montreal2.voip.ms     85.9863
   montreal3.voip.ms     76.4058
   montreal4.voip.ms     96.7013
   toronto2.voip.ms     103.7986
   toronto3.voip.ms     143.3156
   toronto4.voip.ms     136.0254
   toronto.voip.ms      104.1012
   london.voip.ms       157.3885

Powershell 

Dec 2017 - A bug in the code shown washington2.voip.ms as the best server, this was corrected.

# Usage: Copy and paste the following code into a powershell window
# To run it from a command prompt, save this file with extension ps1. 
# Then run Powershell.exe -file "pathtothisscript.ps1"
Clear-Variable best* -Scope Global #Clear the best* variables in case you run it more than once...
#Get the list of servers into an array
$Servers =      
@("amsterdam.voip.ms","atlanta.voip.ms","atlanta2.voip.ms","chicago.voip.ms","chicago2.voip.ms","chicago3.voip.ms",
"chicago4.voip.ms","dallas.voip.ms","dallas2.voip.ms","denver.voip.ms","denver2.voip.ms","houston.voip.ms",
"houston2.voip.ms","london.voip.ms","losangeles.voip.ms","losangeles2.voip.ms","melbourne.voip.ms","montreal.voip.ms",
"montreal2.voip.ms","montreal3.voip.ms","montreal4.voip.ms","montreal5.voip.ms","montreal6.voip.ms","montreal7.voip.ms",
"montreal8.voip.ms","newyork.voip.ms","newyork2.voip.ms","newyork3.voip.ms","newyork4.voip.ms","newyork5.voip.ms",
"newyork6.voip.ms","newyork7.voip.ms","newyork8.voip.ms","paris.voip.ms","sanjose.voip.ms","sanjose2.voip.ms",
"seattle.voip.ms","seattle2.voip.ms","seattle3.voip.ms","tampa.voip.ms","tampa2.voip.ms","toronto.voip.ms",
"toronto2.voip.ms","toronto3.voip.ms","toronto4.voip.ms","toronto5.voip.ms","toronto6.voip.ms","toronto7.voip.ms",
"toronto8.voip.ms","vancouver.voip.ms","vancouver2.voip.ms","washington.voip.ms","washington2.voip.ms")
$k = 0 #Counting variable so we know what server number we are testing
#num of servers to test
$servercount = $servers.length 
#Do the following code for each server in our array
ForEach($server in $servers)
{  
  #Add one to the counting variable....we are on server #1...then server 2, then server 3 etc...
  $k++
  #Update the progress bar                    
  Write-Progress -Activity "Testing Server: ${server}" -status "Testing Server $k out of $servercount" -percentComplete ($k / $servercount*100) 
  #Counting variable for number of times we tried to ping a given server
  $i = 0
  Do{
     #assume a failure
     $pingsuccess = $false 
     $i++ #Add one to the counting variable.....1st try....2nd try....3rd try etc...
     Try{
         #Try to ping
         $currentping = (test-connection $server -count 1 -ErrorAction Stop).responsetime 
         #If success full, set success variable
         $pingsuccess = $true
     }
     #Catch the failure and set the success variable to false
     Catch {
      $pingsuccess = $false 
      }     
  }
  #Try everything between Do and While up to 5 times, or while $pingsuccess is not true
  While($pingsuccess -eq $false -and $i -le 5) 
  #Compare the last ping test with the best known ping test....if there is no known best ping test, assume this one is the best $bestping = $currentping 
  If($pingsuccess -and ($currentping -lt $bestping -or (!($bestping)))){ 
  #If this is the best ping...save it
        $bestserver = $server    #Save the best server
        $bestping = $currentping #Save the best ping results
  }
  write-host "tested: $server at $currentping ms after $i attempts" #write the results of the test for this server
}
write-host "`r`n The server with the best ping is: $bestserver at $bestping ms`r`n" #write the end result
Pause

Linux Shell Script

Pings several voip.ms servers 

  #!/bin/sh
  # Ping several servers and display Latency, Jitter and Packet Loss 
  #
  # First, create a text file with all servers you want to ping - one host name per line. 
  # The list of voip.ms servers is available at http://wiki.voip.ms/article/Choosing_Server
  myHF="voip_ping_hosts.txt"
  # Sample file:
  #    toronto.voip.ms
  #    montreal.voip.ms
  #    seattle.voip.ms
  #    chicago.voip.ms
  #    newyork.voip.ms
  #
  echo "============================================"
  printf "%-20s %7s %8s %6s\n" "VoIP Server" "Latency" "Jitter" "Loss"
  echo "============================================"
  cat ${myHF} |\
  while read myLn
  do
     ping -c 3 -i 5 -q $myLn |\
     awk '/^PING / {myH=$2}
          /packet loss/ {myPL=$6}
          /min\/avg\/max/ {
             split($4,myS,"/")
             printf( "%-20s    %3.1f    %1.3f   %4s\n", myH, myS[2], myS[4], myPL)
         }'
  done
  echo "============================================"

Output: 

  ============================================
  VoIP Server          Latency   Jitter   Loss
  ============================================
  toronto.voip.ms         68.3    0.439     0%
  montreal.voip.ms        89.6    0.197     0%
  seattle.voip.ms         71.2    0.387     0%
  chicago.voip.ms         71.6    0.084     0%
  newyork.voip.ms         79.1    0.411     0%
  ============================================

Latency and its importance

Latency is very important for Voip, this will determine the time that will take for the data package transmission to reach the destination. A high latency will lead to a delay and echoes in the communication.

Latency is measured in milliseconds (ms) For example: a latency of 150ms is barely noticeable, thus acceptable. Higher than that, quality starts to suffer. When it gets higher than 300 ms, it becomes unacceptable.

Retrieved from "https://wiki.voip.ms/article/User:Joseph.voip.ms/Sandbox"
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