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No ringback tone over InterCluster Trunk

fei he
Explorer
Explorer

Hi All

we are hitting a strange issue where incoming call delivery to another cluster via ICT trunk on ISDN did not hear ringback tone. call flow as below:

Caller A calling -- PSTN --SIP-- CUBE-E --SIP-- CUCM 1 -- H225 ICT non GK control -- CUCM 2 - user B(CFA to external landline via ISDN VGW)

 

Where Caller A heard ringback tone when user B is CFA to mobile phone.

Can someone help on this?

Fei

 

 

2 Replies 2

Leo Salcie Tejeda
Rising star
Rising star

Hi Fei,

 

what you have it's a very complicated call flow...I recommend to troubleshoot the call dividing the problem into part.

When he call is loosing the ringback tone? Try to register a phone in each part of the call flow to troubleshoot the problem.

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leo

issue resolved after we swing to SIP trunk.

thanks for your help.

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