Re: Selection of media (m=) at MG

Raju,

In addition, [TS 183 002/Clause 7.1.4] indicates that if announcement 
are remote to MG, "the MGC shall initiate a connection to an external 
announcement machine (MRF), by
temporarily adding a termination into the context.".

I understand that this context should be the same that contains the 
termination play announcements. For example, in:

TE <--->  MG <--->  MRF


MG must ge the announcements from MRF and play them to TE. For that, I 
understand MGC must create the next contexto in the MG:

TE <-- [Termination A (codec PCMU)] -- *  -- [Termination B (codec 
PCMU)] --> MRF

So, termination B is used to get the announcements, and termination A is 
used to play them.

But, if "when a signal (tone/annc) is played on one termination, the 
termination is temporarily disconnected oneway", then while termination 
A playing a announcement, it can not continue to receive announcement 
that continue to get the termination B.

Javi


El 12/12/2011 12:31, Javi Muñoz escribió:
> Raju,
>> In fact, when a signal (tone/annc) is played on one termination 
>> (signal going outside of the context),
>> the termination is temporarily "disconnected oneway" (so it won't 
>> receive any data, but can send) from
>> the other terminations (as if the termination has "oneway" topology 
>> to others).
>>
>>
> When a signal is played by the MG, does the MG automatically applied 
> that "oneway" topology, or it should be explicitly indicated by the 
> MGC in the configuration of the termination?(it would be on the 
> Stream, rather than on the termination, since it migth be a 
> multistream termination)
>
> Javi
>>
>>> -----Original Message-----
>>> From: [email protected]
>>> [mailto:[email protected]] On Behalf Of Javi Muñoz
>>> Sent: Thursday, December 01, 2011 12:43 PM
>>> To: [email protected]
>>> Cc: Bhattacharjee, Arindam (Arindam)
>>> Subject: Re: [Megaco] Selection of media (m=) at MG
>>>
>>> Arindam,
>>>
>>>> You can use another option: have reserve value on and use
>>> both g711 and Clearmode on both remote and local SDP and MG
>>> will send in g711 only because that has higher preference
>>> when G711 appears before CLearMode codec in the list as follows:
>>>>    m=audio<puerto>    RTP/AVP 0 [8]<PT_dinámico>
>>>>    a=rtpmap:<PT_dinámico>    CLEARMODE/8000
>>> When the Remote descriptor has several audio codecs in the line "m=":
>>>
>>>    m=audio<puerto>    RTP/AVP 0 [8]<PT_dinámico>
>>>
>>>
>>> I understand that:
>>>
>>> 1º First codec in the line is used if it is possible.
>>>
>>> 2º In case that codec may not be used (for an error, for
>>> example), the
>>> second codec would be tried (I understand this is the reaseon why the
>>> Remote descriptor may have several audio codecs in the same line "m=).
>>>
>>>
>>> If it is so, and we use:
>>>
>>>    m=audio<puerto>    RTP/AVP 0 [8]<PT_dinámico>
>>>
>>>
>>> What would happen if when MG needs to send the tone/ann., the
>>> codecs "0"
>>> and "8" may not be used?. MG would try to send the tone/ann. to the
>>> terminal using CLEARMODE, when terminal is not ready to receive that.
>>>
>>> Javi
>>> _______________________________________________
>>> Megaco mailing list
>>> [email protected]
>>> https://www.ietf.org/mailman/listinfo/megaco
>>>
>
> _______________________________________________
> Megaco mailing list
> [email protected]
> https://www.ietf.org/mailman/listinfo/megaco
>