UC540 to UC540 - Call forwarding reverts to VM dial-peer on Originating UC540

[R M]

We have two UC540s. Both devices are configured with identical dial-peers for voice mail.

When a call from UC540-A is made to a DN on UC540-B, if it goes unanswered and is set to forward to the voice mail pilot, the call is directed to the dial-peer for the voice mail pilot on the originating UC540-A.

Everything else appears to be working fine. It's only calls that originate on one UC540, are destined for the other UC540, and then call-forwarded to voice mail.

When call-forwarding is setup on a DN, does it normally use the dial-peers of the originating calling party's UC540 instead of the dial-peers on the UC540 of the DN that is forwarding?

No other numbers overlap except the voice mail pilot.

Thanks!

[R0g22]

What protocol are you running b/w the UC ? SIP or H.323 ?

[R M]

The protocol specified on the dial-peers between the two UC540s is cisco, not sipv2.

[R0g22]

Can you add a "show run" from both the UC's ?

[Mohammed al Baqari]

This is normal behaviour. When the call isn't answered, call forward
message is sent to initiator (depending whether you keep 302 message
enabled or you disable it and use INVITE/UPDATE messages).

Now the initiator will initiate a followup call to the number provided as
VM in 302 message. Since you are using identical dialpeers, UC-A won't send
it to UC-B. Instead it will send it to local VM (depending how your
dialpeers are configured but I am assuming that UC-A VM is longer match
than UC-B VM).

You can tweek this by using prefixes for UC-A VM and strip the prefix when
the dialpeer of VM is matched.