[Serusers] Fwd: need help implementing sip callback - sr-users

12 Oct 2007

---------- Forwarded message ----------
From: Rogelio Serrano &lt;rogelio.serrano(a)gmail.com&gt;
Date: Oct 11, 2007 5:18 PM
Subject: Re: [Serusers] need help implementing sip callback
To: Atle Samuelsen &lt;clona(a)cyberhouse.no&gt;

On 10/11/07, Atle Samuelsen &lt;clona(a)cyberhouse.no&gt; wrote:
...
  * Rogelio Serrano &lt;rogelio.serrano(a)gmail.com&gt;
[071011 07:51]:
  any pointers? 
 You could proberbly get some pointers if you would describe what you
 wanted properly. If you want a function like *393939# to make it call
 back the last caller tell us... I do not know..

 - ATle

i want to ring phone a. then when phone a picks up i would play
recording that phone a has n minutes for this call.

then i ring phone b and when he picks up connect to phone a.

so whats the best way to do this? when the two parties are pstn phones?

the most obvious method is to use an rtp proxy.

how is nat hairpin possible when i dont know which udp port both
parties are going to use?

...

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