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Latest revision as of 18:55, 24 May 2018

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.

User:Joseph.voip.ms/Sandbox

From VoIP.ms Wiki

Latest revision as of 18:55, 24 May 2018

Contents

Choosing a Server

Server Points of Presence

Server Realms

What is a Ping?

How does the ping work?

How to ping on a PC

How to ping on a Mac Computer

Latency Testing Scripts (User Submitted)

Bash Script To Handle The Mac Ping Output Format

Perl Script

Powershell

Linux Shell Script

Latency and its importance

Personal tools

Namespaces

Variants

Views

Actions

Search

VoIP.ms Wiki

Getting Started 👋

Device Configuration

Common Setups

Account & Billing

Troubleshooting 🛠

VoIP.ms Features

Security & Technical

Guides 🇨🇦

Guías 🇲🇽

Toolbox

@@ Line 1: / Line 1: @@
-[12:15] William: Voip.MS est essentiellement un service de fournisseur dans tout le monde pour Termination Calls ('''appels sortants''') et Origination ('''appels entrants'''). Dans le système VoIP.ms, les appels entrants et sortants sont facturés séparément. Le service peut être utiliser uniquement pour les appels sortants, n'est pas nécessaire pour vous d'obtenir un DID (numéro de téléphone) si vous n'avez pas besoin de recevoir des appels entrants.
+== Choosing a Server ==
-  VoIP.ms vous permet d'utiliser un de vos propres [[Devices]] (dispositifs comme un ATA Linksys (Adaptateur téléphonique) ou un logiciel comme [[X-Lite | X-lite]]).
+[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.
-VoIP.ms est un fournisseur de service prépayé et vous devez effectuer un dépôt minimum de 25$ dans votre compte pour pouvoir utiliser les services. Tous les frais seront déduits de votre solde du compte. Votre compte ne sera pas en mesure de recevoir ou passer des appels lorsque votre solde atteint zéro.
+=== Server Points of Presence ===
-L'inscription est libre de toutes charges. Vous pouvez naviguer autour, vérifier les caractéristiques, configurez votre appareil et le tester avec notre "Echo Test" application, même sans l'ajout de fonds.
+In the following links you will find a table with the server's information including their IP addresses.
-'''Route''' (Value/Premium) peut être mis aux choix par le client dans les [[Paramètres du compte]] sur le portail client. Par défaut, les nouveaux comptes sont configurés pour utiliser la route "Value". Les routes Value/Premium s'applique séparément pour US48/CA et l'international.
+{| class="wikitable" style="font-size: 200%; border: none; width: 60%; height: 80px; text-align: center;"
+| [[Servers#Canada | Canada]] || [[Servers#USA  | USA]] || [[Servers#International  | International]]
+|}
-__TOC__
+[[File:ChooseServerImg.png|thumb|none|1280px|VoIP.ms servers]]
-== Appels sortants ==
+===Server Realms===
-=== Tarifs USA ===
+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.
-* Premium Route: 0,01 $ (1¢) par minute
+ Please note that the following servers will not be available to select as a DID Point of Presence for newer accounts:
-* Numéro sans frais (800): gratuit
+ 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.
-* Numéros sans frais route Premium (800): 0,0106 $ (1,06 ¢) par minute
-* E411: 0,99 $ par appel. Il doit être activé par le client dans les paramètres du compte.
-=== Tarif pour le Canada ===
+= What is a Ping? =
-*Value Route: La plus part du Canada 0.0052$ (1/2¢) par minute.
+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).
-*Premium route: $0.009 (0.9¢) par minute.
-*Tout les destination du Canada son sur la liste des tarifs. [http://www.voip.ms/rates.php rates]
-=== Tarif International ===
+Ping tools are part of Windows, Mac OS X and Linux as well as some routers.
-*Liste disponible sur [http://www.voip.ms/rates.php rates].
+== How does the ping work? ==
-*Fréquence actualisation des tarifs: Rare. Parfois, nous allons augmenter ou baisser le taux sur certaines destinations, si nécessaire.
-=== Facturation par Tranches ===
+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).
-*USA et Canada: 6 secondes
+==How to ping on a PC==
-*International: 6 secondes
-*Mexico: 60 secondes initial / 60 seconds.
-== Appels Entrants ==
+Pinging is a command which tells you if the connection between your computer and a particular domain is working correctly.
-'''Disponibilité des numéros de USA/Canada '''
+In Windows, select Start > Programs > Accessories > Command Prompt. This will give you a window like the one below.
-*48 Etats des Etats Unis
+Enter the word ping, followed by a space, then the domain name.(montreal.voip.ms) in this case domain is our server name.
-*4 Provinces de Canada
-=== Plan par minute pour les numéros USA / Canada ===
+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.
-*Taux Mensuelle:
+[[File:Ping.gif|thumb|none|600px|Ping]]
-:USA: <s>($0.99 to $1.49)</s> $0.85 to $1.25
-:Canada: <s>($0.99 to $1.99)</s> $0.85 to $1.70<br/>
-*Taux par appel reçu par minute:
-:<s>($0.01 to $0.0149)</s> $0.009 to $0.0125
-*Frais d'activation: $0.40 <s>($0.50)</s>
-*Facturation par Tranches: 6 seconds
-*Channels: Capacité haute des "Channels" (25 channels sur ce plan, ça veux dire que vous pouvez recevoir jusqu’à 25 appels en même temps)
-=== Plan Taux Fixe USA / Canada ===
+==How to ping on a Mac Computer==
-*Taux Mensuelle:
+- Click on Finder in the dock.
-:USA: <s>($4.95 to $6.95</s> $4.25 to 6.00
-:Canada: <s>$4.95 to $5.95)</s> $4.25 to $5.15
-*Taux par appel reçu par minute: gratuit jusqu’à 3500 minutes.
-*Frais d'activation: <s>($1.00)</s> $0.85
-*Channels: 2 (Votre numéro DID pourras recevoir jusqu’à 2 appels en même temps)
-*Utilisation: Residentiel
-===Service Supplémentaires===
+- Click on Applications.
-*[[Service E911]]/911 $1.50 par mois
+- Click on Utilities.
-*CNAM [[ID de l'appelant]] name Lookup - 0.8 cent par recherche.
-*[[Boîte Vocale]] il y a pas un limite de boite vocales.
-==Prix des Numéros Sans Frais (Toll Free Numbers) ==
+- Double-click on Network Utility. &#42;
-===Pour un opérateur des Etats Unis===
+&#42; 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"
-Il accepte les appels des Etats Unis par défaut et il peut être débloquer sur demande pour accepter les appels entrants provenant du Canada aussi.
+- In the Network Utility window, click on the Ping tab
-*Taux Mensuelle: $0.99
-*Taux par appel reçu par minute:
-*USA / <s>$0.024 (2.4¢)<s/> $0.019 (1.9¢)
-*CANADA (Déblocage par demande) / $0.08 (8¢)
-*ALASKA (Déblocage par demande) / $0.17
-*PUERTO RICO (Déblocage par demande) / $0.095
-*Facturation par Tranches: 6 seconds
-*Frais d'activation:  Aucun
-*Channels: 25 (Augmentation par requête)
-===Depuis un opérateur Canadien===
+- In the field under "Please enter the network address to ping," like montreal.voip.ms
-Il accepte les appels entrants des deux Etats-Unis et du Canada, tous aux même prix.
-*Taux Mensuelle: $1.49
+''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.''
-*Taux par appel reçu par minute:
-*USA / $0.032 (3.2¢)
-*Facturation par Tranches: 6 seconds
-*Channels: 25 (Augmentation par requête)
+The following is the output of running ping with the target losangeles.voip.ms.
-*Taux Mensuelle: <s>($1.49)</s> $1.25
+ #ping losangeles.voip.ms
-*Taux par appel reçu par minute:
+ Ping to losangeles.voip.ms [67.215.241.250] with 32 bytes de datos:
-:Canada: <s>$0.032 (3.2¢)</s> $0.027 (2.7¢)
+ Response from 67.215.241.250: bytes=32 time=67ms TTL=52
-:USA: <s>$0.032 (3.2¢)</s> $0.027 (2.7¢)
+ Response from 67.215.241.250: bytes=32 time=69ms TTL=52
-:Alaska: $0.17
+ Response from 67.215.241.250: bytes=32 time=68ms TTL=52
-:Puerto Rico: $0.095
+ Response from 67.215.241.250: bytes=32 time=67ms TTL=52
-*Facturation par Tranches: 6 seconds
+ ping statistics from 67.215.241.250:
-*Channels: 25
+packets transmitted, 4 received, 0% packet lost. rtt min/avg/max/mdev = 67ms, 69ms, 67ms
-==Prix des numéros International==
+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
-*Prix varie selon les pays,  veuillez consulter sur votre compte  DID Numbers >> Order DID >> International.
-== Facturation d'un numéro International ==
+= 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 ===
-*Tarif par mois (ceci depend du pays)
+<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
-*Appels entrantes illimité
+e.g. Save script below using your favourite editor as pingVoipMS.sh (2) chmod u+x pingVoipMS.sh (3) ./pingVoipMS.sh
-*Channels: 2
+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.
-*Frais d'installation versée lorsque DID est commandé
+</p>
-*Frais mensuels facturés le 1er de chaque mois
+<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
+# 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 "================================================================"
+</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]]