[SR-Users] Legacy Cisco 7945 and 7960 Handset Integration with Kamailio

[Alex Balashov]

Hello Jonathan,

On 03/19/2014 03:29 PM, Jonathan Hunter wrote:

> I appreciate these handsets have some issues, whereby they expect
> responses on port 5060, even though they initiate transactions from a
> dynamic port, I just  wondered if anyone had a working model or some
> pointers they could share?

1) If the phone properly indicates port 5060 in the Via header, then 
Kamailio will send responses to that port regardless of the source port 
of the requests to which it is responding.

That is, unless you have force_rport() on, the precise function of which 
is to override that default behaviour and use the source port instead.

2) I have a 7960 desk phone that I use with Kamailio. It's behind NAT in 
relation to Kamailio, and giving it the usual NAT treatment (nathelper 
fixups, rtpproxy) works just fine.

-- 
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/