A client of mine has a 2811 voice gateway, a CallManager server running CCM4.0(2a), and a Siemens PBX. The PBX is connected to the 2811 using E1 PRI.
Basically, all IP phones are able to make outbound calls to the connected PBX. However, calls coming from the PBX results in a busy tone.
Using debug voice dialpeer, I can see that the Calling and Called numbers are correct and that the proper dialpeer is being triggered, but then, the call still fails.
Also tried csim start 6002 from the 2811 in an attempt to simulate an incoming call to an IP phone, but I get the error Call Setup failed.
Here's the dialpeer:
dial-peer voice 6000 voip
session target ipv4:192.168.17.1