[VoiceOps] Canadian TFN Calls

GB gb20090101 at gmail.com
Fri Oct 19 12:03:05 EDT 2012

A TFN has no geographical belonging. When issued by a RespOrg - it's just "a" 800/888/877/866/855 number.

For TFNs there is such a thing as _area_of_service which can be a set on request of a TFN owner (user) to include a list of countries (f.e. - Caribbean region), a country - for example - Canada or US, a list of LATAs or a single one, list of NPAs and or NPA NXXs as well as any combination of the above.

If a TFN owner wants to limit its area of service to Great Toronto ONLY - they can do it (by asking their RespOrg). Because the TFN owner pays for calls coming to his/her number depending on a call's origin.

Just to give an example - an average rate to get a TF call from Alaska to New York is ABOVE $0.20. Therefore a local liqueur store or even Mercedes Benz dealership don't want for calls from Alaska to hit their numbers even by mistake.

Regarding "playing" a message - this is a correct behavior because _what_ should be done in case of call being out of area of service is also configured by a request from TFN owner by its RespOrg. A CLEC which received a call to a TFN does SS7/TCAP request to its TF lookup provider in order to find out to where the call should be sent (which IXC - long distance carrier) to. If no carrier for originating area of service returned - then a type of message preconfigured on TFN's record must be played back to a caller.

On Oct 19, 2012, at 11:44 AM, Jared Geiger wrote:

On Fri, Oct 19, 2012 at 11:31 AM, Shripal Daphtary <shripald at gmail.com> wrote:
> oops, didn't finish my though.
> i'm assuming there is no way to differentiate between a US TFN and CANADIAN
> TFN right?
> thanks
> srhi

There isn't a way to tell. Some TFN that a Canadian dials won't
terminate but then the same number dialed will terminate with a US
Caller ID.
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