Re: Selection of media (m=) at MG

A second comment,

If:
>>     a) TGW: no impact, because tone/announcement inserted by ISDN 
>> local exchange (terminating Q.931); TGW needs just clearmode support

(I agree)

then, why?
>> E.g., MGC
>> ->  call establishment phase: IF tones/announcements THEN H.248 
>> Command.req for tone/announcement control plus media configuration 
>> with voice codec

That "media configuration with voice codec" (G.711) would be done at the 
MeGaCo termination of the IP side of the MG, not at the termination of 
the ISDN side. If tone/announcement is inserted (in the UNI ISDN) by 
this MG, the termination of the IP side of the MG would not be used, so 
that "voice codec" would not be relevant (no media would be transported 
over the IP network).

am I wrong?

Regards,

Javi