[Users] too many branches for latest X-lite 3

[Klaus Darilion]

Sajith T S wrote:
> Jan ONDREJ (SAL) wrote:
> 
>>   I have problems with too many branches for latest X-Lite release 1011s
>> stamp 41150. Other phones are working properly. X-Lites are trying to
>> subscribe each 40 seconds with different rinstance strings. Example:
> 
> Out of curiosity, what is rinstance parameter, and what is it used for?
> The Internets doesn't seem to know.

It is a proprietary parameter to identify which registration caused an 
incoming call.
E.g. a SIP client registers to 2 proxies, e.g. klaus at iptel.org and 
klaus at fwd.pulver.com. It will use the contact header 
sip:user at localipaddress.

If there is an incoming request, the RURI is sip:user at localipaddress and 
the client can't reliable tell if this is an incoming call from 
iptel.org or fwd.

By adding a different instance header for each proxy it is possible to 
distinguish incoming calls, e.g.:
Contact: sip:user at localipaddress;rinstance=1234 for iptel account
Contact: sip:user at localipaddress;rinstance=5678 for fwd account

btw: snom phones use line=... and AVM Fritz use uniq=...


regards
klaus