[VoiceOps] Canadian TF termination

[Ujjval Karihaloo]

Thx all for the valuable insights!



*From:* VoiceOps [mailto:voiceops-bounces at voiceops.org] *On Behalf Of *Ivan
Kovacevic
*Sent:* Friday, January 23, 2015 1:04 PM
*To:* Calvin E.
*Cc:* VoiceOps
*Subject:* Re: [VoiceOps] Canadian TF termination



Calvin

This is exactly how it works. ANI doesn't matter (although some IVRs also
have application based ANI filters)

We work with contact centres on both sides of the border, who often
transfer to TFNs, and we had to hard code trunks for specific TFNs as there
are also US based numbers that do not take traffic from Canadian trunks.

It is a pain in the ...

On 23 Jan 2015 14:33, "Calvin E." <calvine at gmail.com> wrote:

I thought it worth sharing some feedback from a coworker who has been doing
this a few decades longer than myself:



"First, there's no such thing as a "Canadian" TFN.  There are NANP TFNs
that can, in theory, be dialed from anywhere in the NANP.  Due to massive
cost differences, NANP telcos allow TFN owners to restrict dialing to
certain areas - 48 states, AK, HI, Canada, USVI/PR, Caribbean, or any
combination thereof.



"Second, it doesn't matter what the ANI of the calling number is.  What
matters is where the call is dropped into the PSTN.  Thus, if a TFN that is
restricted to Canadian callers only is dialed, and we drop that call off to
one of our US TF Termination vendors, the call will be blocked, as the
first PSTN vendor in the line does an SMS dip, sees this TFN is restricted
to Canada dialers only, sees the call is entering the PSTN in the US, and
rejects it whether the calling number has a Canada NPA or a US NPA."



I hope this helps you find a solution.



--Calvin, a voice services engineer



On Fri, Jan 23, 2015 at 8:38 AM, Ryan Delgrosso <ryandelgrosso at gmail.com>
wrote:

We have trunks with a few canadian providers and route calls from canadian
source numbers to TF calls exclusively over trunks to canadian providers.
Usually that solves the issue.

On 1/22/2015 10:39 AM, Ujjval Karihaloo wrote:

Hi All:

  We are being told by Level3 that if a Canadian DID calls a Canacdian TF
number, they cannot guarantee call complete and its best effort. Anyone
else run into something similar?





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