CallManager SIP trunk CUBE: One-way Voice Issue after Transfer

[Geovanny Xavier Ramirez Espinoza]

Hi. I have a CCM 8.5 with sip trunk to 2911 cube and PSTN, CCM---->SIP TRUNK--->CUBE--->SIP--->PSTN. I have a sip profile assigned to sip trunk with early ofer and send send-receive SDP in mid-call.

When I make a calling from sccp phone to PSTN the call is established, but after i tranfer the call to another sccp phone, i can hear the person from other side, but the other person doesnt hear me.

I dont have checked mtp required over sip trunk, because i understand ccm allocate MTP if dtfm is not compatible betwen end points.

[vandana]

HI,

You should collect the follwoing debugs and show cmd to trace the audio and rtp endpoint.

debug ccsip mess

debug voip ccapi iout

sh call act voi bri ( capture couple of times while call is up)

Regards,

Vandana

[DOUG DAVIDSON]

What version of IOS are you running on the 2911?

[Geovanny Xavier Ramirez Espinoza]

Hi. the problem was solved changing MOH from MULTICAST to UNICAST, but sometimes the transfer fail. I think that MOH resources is exhausted. How I can monitor MOH resources?

[kking2008]

i have seen this, and checking MTP on the SIP trunk resolved it for me.