On Jan 2, 2015, at 5:20 PM, Thomas Auge <auge@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@virtues.net <mailto:auge@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@virtues.net <mailto:auge@virtues.net> <mailto:auge@virtues.net<mailto:auge@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