[VoiceOps] IAM callername instead of CNAM
carlos at televolve.com
Wed Feb 3 12:38:40 EST 2010
I guess I should have specified that this is a client-profile PRI which
we have allocated as a one-to-one relationship for a specific customer.
However TWTC did tell me that they do this on all PRIs.
On 2/3/10 10:34 AM, David Birnbaum wrote:
> That's a mistake/misconfiguration. I believe Canada sends CNAME inband,
> but in the US, it probably just means somebody is using a client-profile
> PRI for a carrier circuit, doing toll-bypass, or playing other games. We
> have seen this type of misconfiguration on smaller VoIP carriers.
> Time Warner may carry CNAM internal on their network so they can save
> the money on CNAM dips, but obviously that won't go far.
> On Wed, 3 Feb 2010, Carlos Alvarez wrote:
>> Time Warner does transmit the name info that you send. We have a TWTC
>> PRI and I've seen the same thing when calling another number on their
>> network. It has even happened to numbers on other networks, though now
>> I can't remember which ones. One of their engineers confirmed that
>> they do this on purpose, but also couldn't tell me which other
>> networks accept this from them.
>> On 2/3/10 9:24 AM, milosz wrote:
>>> hi all,
>>> has anyone heard of a US residential carrier transmitting the callername
>>> parameter from the IAM instead of doing a normal CNAM lookup? i have
>>> some users--for whom the pbx is (intentionally) set up to transmit an
>>> invalid cpn--who are claiming that when they call their home phones from
>>> the office, their internal (sip) caller name appears on the caller id
>>> along with the invalid cpn, which makes no sense from a CNAM lookup
>>> standpoint. the only thing i could think of (other than they are
>>> nuts/lying) is that their gateway is transmitting the sip callername in
>>> the IAM and the carrier is passing that along instead of doing a lookup.
>>> the btn is the same for all users so that can be ruled out.
>>> they are all on cablevision or time warner.
>>> VoiceOps mailing list
>>> VoiceOps at voiceops.org
>> Carlos Alvarez
>> Advanced phone services simplified
>> VoiceOps mailing list
>> VoiceOps at voiceops.org
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