[Asterisk-Dev] help needed implementing H324M (UMTS Video)

[Steve Underwood]

Klaus Darilion wrote:

>
>
> Paul Cadach wrote:
>
>> Hello,
>>
>> Klaus Darilion wrote:
>> [skip]
>>
>>> I'm yet not sure were to put the gateway - the strange thing is that
>>> H.324 are 2 calls in one. There is at first the call to setup a data
>>> channel - e.g. on ISDN a B channel will be setup using Q931 
>>> signaling in
>>> the D channel. After the B channel is established, H.245 will be used
>>> setup the video call).
>>
>>
>>
>> There is B-channel bonding to expand single video call to 128Kbps. 
>> First call just set up framing (H.223) and
>> signalling(H.245??) then originating endpoint makes second call with 
>> H.223 framing and bond both calls (read - two
>> B-channels each with own H.223 framing) into single "big" channel 
>> with single H.245 multiplexed over two H.223 channels.
>
>
> Hi Paul!
>
> Are you sure about the bonding? I've went through the standards and 
> bonding was never mentioned.
>
> regards,
> klaus

When you want more than 64K in an ISDN call, you ask for it as you set 
up the call. There is a "bearer transfer mode" field, which lets you ask 
for various quantities of 64K circuits. Obviously, for a BRI only 64K or 
2x64K make any sense.

Regards,
Steve