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@domain.com'.
Goal is to use DID for caller ID, but I like to avoid modifying the 'From header'.
Any thoughts?
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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@domain.com’.
Goal is to use DID for caller ID, but I like to avoid modifying the ‘From header’.
Any thoughts?
dan-sig2
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
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@lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of Alex Balashov Sent: Thursday, September 19, 2013 3:14 PM To: sr-users@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@domain.com'.
Goal is to use DID for caller ID, but I like to avoid modifying the 'From header'.
Any thoughts?
dan-sig2
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
-- 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/
_______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
2013-09-19 21:25, Daniel W. Graham skrev:
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
You can use the uac-module to change the From-header: http://kamailio.org/docs/modules/stable/modules/uac.html
More specific the function: uac_replace_from
I use this for normalizing the format from my carriers and to my carriers (to the format they expect) so all calls from my Asterisks use the same format, regardless of carrier used for the call.
Make sure you only call uac_replace_from ONCE. From the doc: "Known limitations: The “uac_replace_*” functions can only be run once on the same SIP request. Try to save needed changes in a pseudovariable and apply them once."
/Johan
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Alex Balashov -
Daniel W. Graham -
Johan Wilfer