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VCS calls terminate with 481 Call/Transaction Does not Exist

oliverpowell
Level 1
Level 1

I have a customer that is experiencing call termination after about 45 mins.

These are only external calls via VCS Control/Expressway. Sometimes the call may survive beyond 45 mins and terminate successfully, other times it will disconnect anywhere between 45 mins to over an hour with the error 481 Call/Transaction does not Exist.

Strangely this only seems to be the case with calls out to a Webex address although it needs to be confirmed its not any external call.

The customer has recently change firewalls to Palo Alto and I'm thinking that this may have something to do with it (NAT/ALG etc).

Has anyone had this type of problem before?

If it were a timer expiry I'd expect there to be a problem for every call and it would always be the same time.

Thanks

Oli

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