Issues with calls dropping when they are transferred and the receiving end picks up.

[Anthony Hood]

I am having an issue where one of our business locations is encountering dropped calls when transferring.  Customer calls in > user picks up >customer asks to be transferred to **** > user transfers caller to ****> **** picks up and call instantly drops upon pickup.  How can I see where the issue is happening ? Also, the issue does not happen every time, and a call can be dropped , then when they call back they can be transferred to the same person no problem.

[keglass]

Anthony,

I recommend you also post this to the Cisco Support Community for more information and feedback. You will find a number of similar posts with solutions to help resolve this issue.

https://supportforums.cisco.com/

I hope this helps.

Kelli Glass

Moderator for Cisco Customer Communities

[Hermozol]

Anthony,

If You are using ISR4k as router in branch office with ZBF update IOS to last aviable and change policy from inspect to pass between voice VLAN and CUCM.