CUBE as codec translator

[michael_luo]

I was testing codec translation feature of CUBE, but couldn't get it worked.

Here's the call flow:

IP Phone (5001) --> CUCM (as OGW) --> Gatekeeper (HQ-RTR) --> CUBE (HQ-RTR)  -->  CME (BR2-RTR, as TGW) --> IP Phone (3001).

The symptom was: 5001 can ring 3001.  When 3001 answers, 5001 keeps playing ring-back for a couple seconds, then the call got disconnected.  "debug voip ccapi inout" shows the cause code was 47 (resource not available).

On CUBE, the incoming call leg was G.729, outgoing call leg was G.711.  I configured xcoder on CUBE.

When the call was ringing, I saw this on HQ-RTR:

HQ-RTR#sh gatek call

Total number of active calls = 2.

                         GATEKEEPER CALL INFO

                         ====================

LocalCallID                        Age(secs)   BW

21-130                             2           16(Kbps)

Endpt(s): Alias                 E.164Addr

   src EP: gk-trunk_2            5001

           CallSignalAddr  Port  RASSignalAddr   Port

           10.10.210.11    1720  10.10.210.11    32799

Endpt(s): Alias                 E.164Addr

   dst EP: HQ-RTR                3001

           CallSignalAddr  Port  RASSignalAddr   Port

           10.10.200.3     1720  10.10.200.3     61544

LocalCallID                        Age(secs)   BW

22-130                             2           128(Kbps)

Endpt(s): Alias                 E.164Addr

   src EP: HQ-RTR                5001

           CallSignalAddr  Port  RASSignalAddr   Port

           10.10.200.3     1720  10.10.200.3     61544

Endpt(s): Alias                 E.164Addr

   dst EP: BR2-RTR               3001

           CallSignalAddr  Port  RASSignalAddr   Port

           10.10.110.3     1720  10.10.110.3     63446

Xcoder was registered to HQ-RTR:

HQ-RTR#sh sdspfarm units

mtp-1 Device:hq-xcoder TCP socket:[1]  REGISTERED in SCCP ver 17/10

actual_stream:6 max_stream 6 IP:10.10.200.3  20930  MTP Dixieland keepalive 185 

Supported codec:

                 G711Ulaw

                 G711Alaw

                 G729

                 G729a

                 G729b

                 G729ab

max-mtps:1, max-streams:6, alloc-streams:6, act-streams:0

Attached are the config file for HQ-RTR and BR2-RTR.

Thanks!

[tobin hawkshaw · Accepted solution]

the config looks fine to me, have to unticked 'wait for far end h.245 terminal
capability set' under the trunk?

[michael_luo]

That was it!

Any further documents explain why this needs to be unchecked?

Thank you again!

Michael

[tobin hawkshaw]

glad to be of help.

Check this link out for more information, its basically a stale mate between cucm and cme as they are both waiting for the h245 phase of the call setup which occurs after the call is actually setup, the calls then just times out.

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/8x/video.html#wp1046354

hth