[Asterisk-Users] SIP to MGCP transcoding

[Michael Van Donselaar]

On Sat, 19 Apr 2003 23:28:17 -0400, you wrote:

>Do you have allow=gsm in mgcp.conf?  Do you have the X-Lite set to deal 
>with GSM? What shows on the Asterisk CLI when you call SIP to MGCP using 
>GSM?

I had disallow=gsm in mgcp.conf because the DG-104S doesn't support gsm.
It only supports ulaw,alaw and g729.

If I have any combination of the DG-104S, X-Lite SIP phone, MSN
Messenger, and a Quicknet PhoneJack on the asterisk box dialled into a
meetme room all works fine.  Asterisk is apparently transcoding.  I had
_hoped_ that asterisk would step in to transcode MGCP <=> SIP traffic.

Is asterisk _supposed_ to transcode between ulaw and gsm for SIP <=>
MCGP calls (and I will then monkey with the config files some more), or
is this not the expected behavior?

>Jeremy McNamara
>
>
>
>Michael Van Donselaar wrote:
>
>>I am tinkering with a D-Link DG-104S MGCP adapter and then X-Lite SIP
>>softphone.
>>
>>The D-Link supports g711 and g729.
>>
>>X-Lite supports g711 gsm and g723.1.
>>
>>If I enable ulaw, then I can get them to talk to each other just fine.
>>Meetme works fine, to.
>>
>>If I add
>>
>>disallow=all
>>allow=gsm
>>
>>to /etc/asterisk/sip.conf, then meetme still works, but the phone
>>attached to the DG-104S cannot hear the softphone.
>>
>>Is asterisk _supposed_ to transcode MGCP <-> SIP traffic?
>>
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>>  
>>
>
>
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