I have a situation where have to record some calls from some IP phones. CUCM and server to which is call recorded are in one region (let say RegionA) and phones and HW transcoder (C2650XM) are in other region (RegionB). Gateways to PSTN are also in RegionA. Relation between regions is g729 and inside regions g711. Trunk between CUCM and recording server is SIP.
Problem is when there is call beetween two phones in RegionB. Codec in that case is g711 between phones, and secondary stream to recording server have to go with g729 via transcoder (becouse region relationship). In that case, there is no outgoing stream to recording server from transcoder. I can see inside stream (g711) from phones, but no outgoing.
When testing with several transcoders, we noticed that this scenario works with new 2911 router and PVDM3-256 card,but not working with older 2811 and 2650 and NM-HDV= card.
In attach there is a output of show dspfarm sessions on 2650 router:
- first 4 lines shows transcoding between CUCM and phones while in conference - does not have anything with this case, but it shows that transcoder is working OK
- last 4 lines is incoming streams of phones that are recorded. there is no IP address and there is no outgoing g729 stream to recording server
Is there some limitation with older hardware (maybe SIP signaling) ?