[Freeswitch-users] MP2

[Thomas Auge]

> To understand this a little better.  Is MP2 over data channel a standard that needs to be interoperated with?  Is there
> details how this is signalled to the other side or are both sides just configured to support it?

Unfortunately I don't know. I didn't know there were multiple approaches to this. The currently implemented G722 method 
works with these boxes, so the assumption was it's all the same with other codecs. If a data channel is not a common 
method to achieve this, then it's most likely not what they are doing.


>> On Jan 5, 2015, at 1:06 PM, Michael Jerris <mike at jerris.com <mailto:mike at jerris.com>> wrote:
>>
>> When g722 is used over isdn, it is a voice channel marked as g722, NOT a data channel with voice codec data.
>>
>>> On Jan 2, 2015, at 5:20 PM, Thomas Auge <auge at virtues.net <mailto:auge at virtues.net>> wrote:
>>>
>>> There are ISDN devices which establish a digital (data) ISDN connection and then use all kinds of codecs on top of that.
>>> Think FreeTDM with G722 - same thing. As far as I know FreeTDM doesn't care which codec you choose for a digital
>>> connection. G722 is just the most common use case.
>>>
>>> MP2 is still a widely used standard in broadcast, i.e. for remote contributions.
>>>
>>> On 02.01.2015 19:08, Brian West wrote:
>>>> I'm still puzzled as to why mp2, since ISDN is native PCM (ulaw/alaw), Do you have some legacy files or systems you're
>>>> working with that require this?  Trying to fully understand your thought process and needs.
>>>>
>>>> On Fri, Jan 2, 2015 at 4:04 PM, Thomas Auge <auge at virtues.net <mailto:auge at virtues.net><mailto:auge at virtues.net>> wrote:
>>>>
>>>>    Digital ISDN calls, so I think as far as freeswitch is concerned, voice calls, yes.
>>>>
>>>>
>>>>    On 02.01.2015 18:52, Brian West wrote:
>>>>> In what context?  playing sound files, voice calls what?
>>>>>
>>>>> On Fri, Jan 2, 2015 at 3:49 PM, Thomas Auge <auge at virtues.net <mailto:auge at virtues.net><mailto:auge at virtues.net>
>>>>> <mailto:auge at virtues.net<mailto:auge at virtues.net>>> wrote:
>>>>>
>>>>>    Hello list,
>>>>>
>>>>>    would it be a big task to add mp2 (transcoding) to freeswitch? What would be a realistic bounty for it?
>>>>>
>>>>>    Cheers!
>>>>>
>>>>>    Thomas
>>
>
>
>
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