[VoiceOps] Caller-ID: SIP From vs. P-Asserted-Identity

[Alex Balashov]

Diversion is appropriate for the forwarding scenario, but not 
necessarily some of the others.

On 07/23/2012 05:34 PM, Eric Wieling wrote:

> Set a Diversion: header to specify the CallerID number.
>
> Example:
>      Diversion: <sip:+12125551212 at 172.17.5.11>;reason=rcf
>
> The ;reason=whatever is optional, I don't know of any carriers which use it.
>
> -----Original Message-----
> From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org] On Behalf Of Jay Hennigan
> Sent: Monday, July 23, 2012 5:08 PM
> To: VoiceOps
> Subject: [VoiceOps] Caller-ID: SIP From vs. P-Asserted-Identity
>
> Question for the experts:
>
> We have a scenario where a SIP user originates a call to the PSTN (not
> 9-1-1) with a SIP From: header containing one DID and P-Asserted-Identity showing a different DID.
>
> We expect the carrier to use the P-Asserted-Identity for billing and recordkeeping but send the SIP From: out as the CLID to be displayed to the called party.
>
> Typically this is done in a call center type scenario where an agent wants the CLID to display the main number of the agent  pool and not the specific DID of the agent.  Another scenario is a customer PRI-based PBX that hairpins inbound calls back out to a traveling user and wants to preserve the original caller's information.
>
> One of our terminating carriers uses the P-Asserted-Identity as the displayed CLID and not the SIP From:.  I feel that this is not correct.
>   Opinions?
>
> Numbers have been changed to protect the guilty...
>
> TO: <sip:8055550123 at www.xxx.yyy.zzz;user=phone>
>
> FROM: "Fred
> Flintstone"<sip:+18055550199 at www.xxx.yyy.zzz;user=phone>;tag=1689985881-1343063740200-
> P-Asserted-Identity: "Fred
> Flintstone"<sip:+18055550177 at www.xxx.yyy.zzz;user=phone>
>
> TIME/DATE: Mon Jul 23 17:15:39 2012  (GMT)
>
> RESULT: Called party (8055550123) is seeing 8055550177 as calling party's caller ID instead of 8055550199
>
>
>
> --
> --
> Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net Impulse Internet Service  -  http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV _______________________________________________
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-- 
Alex Balashov - Principal
Evariste Systems LLC
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