[SR-Users] DID Routing

[Daniel W. Graham]

I didn't think of pulling from to header, but in my case the to changes so I think storing in avp may be my only option. Since the call will be sent to an asterisk farm, I think I'll have to prepend rU with did after alias db lookup so while in 'asterisk land', the did and associated user is retained so it can ultimately be sent back to kamailio again where the rU would be replaced with only the did before calling relay.

I assume a location lookup needs performed before I insert the did back in otherwise a location match will not be found? 

Daniel W. Graham
CMSInter.net LLC
989.400.4230

On Aug 16, 2013, at 4:48 AM, "Alex Balashov" <abalashov at evaristesys.com> wrote:

> Yes, but there is absolutely no requirement, arising from the standards, that the To URI have any relationship to the RURI. The To header is, from a semantic point of view, a purely cosmetic commentary on the intended logical destination of the call. Most endpoints will put the dialed digits in there, but they don't have to. 
> 
> Also, formatting changes to the RURI prior to this point, like the usual network edge stripping and prepending, are likely to render it unequal to To. 
> 
> 
> Daniel Tryba <daniel at pocos.nl> wrote:
>> On Thursday 15 August 2013 20:55:27 Alex Balashov wrote:
>>> You can do it however you like, but a common way this is handled is
>> to map
>>> the DID to a registrar AOR using alias_db, then to revert the user
>> part of
>>> the request URI to the DID (having stored it in a variable prior to
>> the
>>> alias_db lookup).
>> 
>> You don't have to store the DID, it is available in $tU. A simple way
>> to 
>> implement is to add to route[RELAY]:
>> 
>> route[RELAY]
>> {
>> #avp(dst_rewriterurito) is 1 if client want DID (from usr_preferences)
>> if($avp(dst_rewriterurito))
>> {
>>     $rU=$tU;
>> }
>> ...
>> }
> 
> --
> Sent from my mobile, and thus lacking in the refinement one might expect from a fully fledged keyboard. 
> 
> 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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