From VoIP.ms Wiki
This feature allows you to filter the incoming calls to your DID numbers that came from specific numbers, area code or even anonymous numbers. For example, if you receive annoying incoming calls from a telemarketing company you can create a filter to route all the calls to a recording that plays the message "That number is no longer in service, please hang-up and try again", amongst several other options.
Create a CallerID Filtering entry
First you need to go your Customer Portal and click on the "DID Numbers">>"CallerID Filtering" menu option.
The first thing you need to set is the type of filter you're going to create. You can choose between:
- Anonymous CallerID Number - CallerID not matching the North American NPANXXXXXX format (Could block International Calls) - Specific CallerID Number
For the first two options you can create a filter only one time and edit it if required. The last option would give you a higher flexibility if you make good use of the Wildcards.
Use of Wildcards (Optional)
X - Matches any digit at the specific location in the number. * - Matches any number of digits and any digit.
For example, let say that the callerID number is 2145550000:
2145550000, 214*, 214XXX0000, 214XXXXXXX and 214XXX00* are examples that match CallerID 2145550000 214XXX7* and 214XXX are examples that do NOT match the CallerID.
After that, select if you want to apply the filter to all your DID numbers or to specific numbers only.
The next options allows you to change the routing of the incoming call. You can route the call to an specific account, an IVR, a Calling Queues, Time Conditions, etc. You can also leave a note for the filter you're creating.
Here are a few samples of what you can achieve with this feature.
- Your business DID is configured to route to your receptionist SIP phone. You would like to receive the calls directly on your Cell Phone when the CallerID matches one of your important client. Simply create a Call Forwarding entry with your cellphone, then create a CallerID Filtering rule with the CallerID of your client and select your Cell Phone forwarding entry as the routing.
- You have a local number with the 214 area code and do not want Callers from this area code to dial your toll-free number, when this happen, you want to playback a message to those callers indicating the local number, you can create a Filter with 214* and redirect routing to a pre-recorded message you have uploaded to the system.