Cannot use AS5400 as software MTP

[Randall Saborio Cubero]

Hi guys,

I have been trying to get this working without any success and I really need some extra MTPs.

Not sure why, but cannot use my AS5400 as software or even hardware MTP for my CUCM 7.1.5.34900-7.

Same deal if I try it with another cluster with 8.5.1.

AS5400 is 15.1(3)T4 but also tried it with an old 12.4T image with same results.

Configuration is very simple:

dspfarm profile 8 mtp

codec g711ulaw

maximum sessions software 10

associate application SCCP

sccp ccm 10.198.161.86 identifier 6 version 7.0

sccp ccm group 4

associate ccm 6 priority 1

associate profile 8 register MTP-Prueba

Just trying to call a SIP phone internally with MTP required but the call fails everytime. If I would use the CUCM MTP, it works fine.

The error I get on the traces is:

19:08:00.995 |StationInit: (0000004) OpenReceiveChannelAck Status=1 (Error: Endpoint failed to open receive channel), IpAddr=IpAddr.type:1 ipAddr:0x00000000000000000000000000000000(::), Port=0, PartyID=16777219|1,100,50,1.196957^10.198.104.24^MTP-Prueba

19:08:00.996 |AgenaInterface(4)::sendErrorToMX, Audio Channel OLCAck with error recd|1,100,50,1.196957^10.198.104.24^MTP-Prueba

I want to know if someone has used such AS5400 as MTP, or if anyone knows a good reason why this just won't ever work.

Thanks,

[Jose Mendez]

Randall,

The AS5400 doesn't show up as a compatible MTP resource for Callmanager use:

http://www.cisco.com/en/US/partner/docs/voice_ip_comm/cucm/admin/8_6_1/ccmsys/a05dsp.html#wp1044172

Hope that helps.

[tnc-nw-offshore]

we have faced the same kind of issue in our network.

It got resolved after enabling the  G.722 codec in phone page , refer the attachement

Before it was disabled and we enabled it and restarted the phone.

You can check and try the same fix in your network.

[Brian Meade]

What does the OpenReceiveChannel message look like?  Can you post the full CallManager traces?

Can you try adding codec-passthrough on the dspfarm profile as well and then run "no sccp/sccp"?