[SR-Users] Caller ID using From header

[Daniel W. Graham]

My issue is I have 1 carrier that doesn't support PAI or RPID for caller ID. Second carrier supports RPID but not PAI. Still waiting verification from the others.

This definitely seems like a big mess, I'd prefer to use PAI since it follows active RFC but the lack of support is surprising.

I'm assuming my two options I'm left with are using DID as usernames to avoid From header changes, or modifying From header.

If I'm forced to modify From header, where would be the place to do so with least negative affects?

All CDR is performed on Asterisk.

UA >> Proxy >> Asterisk >> Proxy >> Carrier

-----Original Message-----
From: sr-users-bounces at lists.sip-router.org [mailto:sr-users-bounces at lists.sip-router.org] On Behalf Of Alex Balashov
Sent: Thursday, September 19, 2013 3:14 PM
To: sr-users at lists.sip-router.org
Subject: Re: [SR-Users] Caller ID using From header

Daniel,

It's a common problem.  The simplest solution - especially if you don't want to modify the From header - is to use one of the headers that superecedes From: P-Asserted-Identity, or Remote-Party-ID (deprecated draft, but very widely used).

Almost all commercial gateways and softswitches prefer them in this order of precedence:  PAI, RPID, From.

-- Alex

On 09/19/2013 02:14 PM, Daniel W. Graham wrote:

> Wondering what others are doing / looking for any tips for the best 
> handling of caller ID in this scenario.
>
> Call flow -
>
> UA >> Proxy >> Asterisk >> Proxy >> Carrier
>
> Carrier only reads caller ID by 'From header'
>
> Asterisk is only used for media functions / b2bua and not user aware.
>
> UA username is not a DID but rather some other string, such as 
> 'dan at domain.com'.
>
> Goal is to use DID for caller ID, but I like to avoid modifying the 
> 'From header'.
>
> Any thoughts?
>
> dan-sig2
>
>
>
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--
Alex Balashov - Principal
Evariste Systems LLC
235 E Ponce de Leon Ave
Suite 106
Decatur, GA 30030
United States
Tel: +1-678-954-0670
Web: http://www.evaristesys.com/, http://www.alexbalashov.com/

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