05-14-2014 11:08 AM - edited 03-16-2019 10:47 PM
I have video call between two phone as below
9971 -- CME --- CUBE ----CUCM --- 9971 (delay offer)
call from cme end to CUCM end works (video and audio) h264 and iLBC
call from CUCM end to cme end connect(video works) but no audio (can see on phone both ends Rcvr discarded) due to cucm end doing 30ms and CME end doing 20ms
Debugs on CUBE shows CME send offer with 30ms but CUBE send offer to CUCM without any ptime ?
CUBE has codec transparent on both ends.
Thanks
05-31-2014 06:43 PM
Try asymmetric payload full under voice service voip > sip.
Do this on both CUBE and CME.
08-06-2014 06:37 AM
use codec ilbc mode 30 at your CME End
05-24-2017 01:40 PM - edited 10-24-2017 08:13 AM
I had the same issue. I resolved it three ways.
The least preferred way:
Go to the inbound and outbound dial-peers on the CUBE. On the dial-peer enter the command
codec ilbc mode #
where # is the lower of the two ptime values. In this instance 20 (from CME side) is lower so the command for this scenario is
codec ilbc mode 20
A little better way:
We can tell CUBE to passthru the SDP. I recommend doing it on the dial-peer instead of doing it globally:
CUBE#conf t
Enter configuration commands, one per line. End with CNTL/Z.
CUBE(config)#dial-peer voice <tag>
CUBE(config-dial-peer)#voice-class sip pass-thru content sdp
CUBE(config-dial-peer)#end
CUBE#wr
Building configuration...
[OK]
CUBE#
Even better way:
Create a voice class codec and have one of the codec preferences be ilbc mode 20
conf t
voice class codec 1
cod pref 1 g711u
cod pref 2 ilbc mode 20
Then apply the voice-class codec 1 to your dial-peers as needed.
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