We are currently having an issue transferring a call between a SIP extn and a extn sitting on cisco call manager.
We are currently using Cisco call manager version: 22.214.171.124900-3
Approx 2 months ago we purchased a call centre software called "IPCM" which integrates with our CRM and our call manager. IPCM is SIP based. This program provides us with Call Queing/Dashbaords soft phones etc.
A SIP trunk was created in our call manager to route incoming calls over to our new "Call centre" server. A new extn range was also configured to allow us to make outgoing calls via the softphones:
The issue that we are currently facing is call transfer. We are unable to transfer a call from "IPCM" to a cisco phone.
Using a IPCM (SIP) Softphone, I make a call to a number i.e. 0412 345 678
I pick this call up and attempt to transfer this through to a cisco extension i.e. 244
the cisco extension (244) rings and picks up. I then attempt to press the "Transfer" button. The mobile call automatically disconnects.
We have checked and confirmed that the Trunk allows all requests i.e. INVITE, REFER, BYE etc.
- Using the same method above (in the example) I am able to succesfully transfer the call if i the call is transferred to a complete number i.e. 0293142-244 rather than the agents extension (244).
Any help will be appreciated.