I configured two third party SIP phone's (say 1001 and 1002) to Cisco Unified CM. Both the phones got registered to the Cisco Call Manager.
But I could not establish call between these two phones. When I am trying to make the call, Cisco Call Manager is giving the "404: Not Found". The reason phrase within the packet has the following codes.
Reason Protocols: Q.850
Cause: 1(0x1)[Unallocated (unassigned) number]
Any body have any idea on this issue? Is I missed out any Cisco CM configurarion?