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Call Pickup sip trunk no audio

Hi All,

 

currently deploying cme (aslo act as cube) with sip phone then connect to itsp sip trunk.  topology as below:

ITSP --- (sip trunk) --- CME (CUBE) ---(register using sip)--- ip phones

 

call from itsp to ip phone and ip phone to itsp already running well.

problem with pickup feature from itsp.

if i call from internal extension to other extension then pickup running well.

if i call from itsp to internal extension (already set up DID) then pickup from other ip phone (within same pickup group) then call connected but no audio on both way. call still connect until one of party hang up the call.

already do some test, i call from itsp to internal extension, then pickup from other ip phone, call connect with no audio, then i "hold" the call from ip phone, then i resume the call, call connect with both audio.

 

someone facing same issue with me in this link https://community.cisco.com/t5/ip-telephony-and-phones/cube-no-rtp-after-pickup/td-p/3714079 . already follow his guide to block the sip updates message, already try config in "voice service voip" and "dial-peer" but somehow cube keep send update message to itsp.

also already try to block with the midcall signaling, using this link https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/configuration/cube-book/voi-cube-midcall-reinvite.pdf , but still no luck.

 

is there anyone out there facing same issue? any suggestion will be appreciated. need help on this.

 

thanks.

Anju Josua

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