Subject: [Sigtran] Signaling Gateway Doubts

From: Pablo Salinas <[email-masked]>
Date: Mon, 30 Jun 2003 09:19:13 -0500 (CDT)

Hi there,
            I am having a hard time to understand one thing in a VoIP Network that uses a softswitch.
Supose, we have the following situation:
There is a softswitch installed in location A. And this softswitch must communicate with the PTT in localtion A. Should it have a Signaling Gateway between the softswitch and the PTT?
If the answer is yes, why use the SCTP, M2UA, M2PA or whatever other sigtran protocol, if it is possible to connect the softswitch directly to the PTT via the MTP2 protocol.
If the answer is no, why in every network scheme I saw until now, there is always a SG between the PTT and the softswitch, when the sofswitch communicates with the media gateways via H.248?
 
                         thanks,
                                      Pablo Salinas

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