I'm after a little help if possible please.
Call forwarding is working internally to a mobile phone however when a customer calls the users direct line they get an error message of "You've dialled an incorrect number"
The directory number in question is set to the correct calling search space.
Could anyone advise any troubleshooting steps>
Thanks for your reply Ishan, i've changed to last redirect number external but still receiving the same error. If i remove the forward everything is working ok again.
As per screenshot, Calling Search Space Activation Policy should be set to With Configured CSS, rather than Use System Default in the DN Call Forwarding section. Please change this and give it a try along with other change.
1. After you changed the Calling Party Selection to last redirect number external did you reset the trunk? If not the change will not take effect.
2. I don't believe "You've dialled an incorrect number" is a message coming from CUCM so that would indicate it's coming from the carrier instead. If so you need to log into the CUBE, enable SIP debugging and compare the logs of an unsuccessful forwarded call to that of a successful call. The differences in the logs should reveal why your carrier is rejecting the call.