[cisco-voip] FXS to VoIP

[Ryan Ratliff]

Then you just need the outgoing voip dial-peer to specify the codec  
you wish to use and it is up to the softswitch to honor the SDP sent  
by the router or reject the call.

-Ryan

On Oct 17, 2009, at 1:18 AM, Ratko wrote:

Hi
The protocl is SIP and the VG is registering as SIP UA on a third  
party softswitch.
Ratko

-original message-
Subject: Re: [cisco-voip] FXS to VoIP
From: Ryan Ratliff <rratliff at cisco.com>
Date: 17/10/2009 03:07

What protocol is the FXS port using to talk to CUCM? If it is H.323
then there will be a voip dial-peer (sounds like this is the case) and
you should use a codec class that allows for g.711 and g.729 (not g.
729b though).  Other than that it is the region configuration between
the FXS port (or the h.323 gw in this case) and the IP phone that
determines the codec used among the capabilities each device
communicates to CUCM.

-Ryan

On Oct 16, 2009, at 7:14 PM, Ratko Dodevski wrote:

Hi, does anyone knows how can I somehow fix a codec on a FXS port or
make it use transcoder or something like that??? I have problem where
when I dial from IP calls are ok but when I use analogue phone on FXS
port it's the same dial peer same negotiated codec (g711) but when i
hit show voice call status it says that codec in use is g729r8. If I
set this codec on the dial peer the call is rejected. I've tried with
voice class codec, but it's the same. only thing I can think of is
transcoder but i don't know how to make a FXS to bring up the
transcoder.

Regards
Ratko

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