[Serusers] phone + pstn with ser and cisco gateway

[Francesco Bottà]

Hi all,

I'm quite sure that it does not exist any command on the Cisco gws to enable symmetric SIP signalling (neither with bind control/media command)....if you issue 'show ip sockets', you will see that local tx sip port is a random port != 5060...

Regards,

Verbal
----- Original Message ----- 
From: "Juha Heinanen" <jh at tutpro.com>
To: "Steve Blair" <blairs at isc.upenn.edu>
Cc: "Miquel" <miquelcapde at gmail.com>; <serusers at lists.iptel.org>
Sent: Monday, April 11, 2005 3:25 PM
Subject: Re: [Serusers] phone + pstn with ser and cisco gateway


> Steve Blair writes:
> 
>  >    I've never looked into that but by default it does not. I thought I would
>  > need "symmtric signaling" in order to define a peer in my Asterisk sip.conf
>  > file but that turned out not to be necessary.
> 
> i was asking because of nat detection.  it turned out that nathelper
> nat_uac_test("3") does not check port number whereas mediaproxy
> client_nat_test("3") requires that both ip address and port in via match
> source ip address and port.  so if call comes from cisco gw, ...
> 
> i surfed on cisco's web pages, but could not find any command that would
> make gw's signaling symmetric.
> 
> -- juha
> 
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