Software Version: CUCM 4.2(3)sr4a
2 Gateways MGCP
This is the scenario.
A call comes from outside of the organization to 76xx to CTI to a receptionist 47xxx. Then call is transferred to the bosses receptionist at DID 7665. Then the bosses receptionist tries to transfer to the boss at DID 7612. The call is dropped and the original caller gets a message from our PRI provider AT&T (all circuits are busy).
This scenario has been tried with many different phones in the same location with the same results.
Further information as follows:
This situation may have been going on since the original Cisco CM install (not sure)
The configuration may have been designed this way to prevent toll fraud
This is a Secured Facility
All internal transfers work flawlessly
1st Hop transfers work fine for example, calls from the outside to bosses receptionist and then to the boss work just fine.
Bosses receptionist phone has been replace with a new one as a precaution
Could this be a mismatch in CSS on the involved phones?
Could this be a device pool issue?
Could this be a dial plan issue?
Could this be a Route Pattern issue?
Could this be a Gateway issue?
Does this scenario sound familiar to anyone?
Any thoughts or observations will be appreciated