I am having a Voice gateway router where a PRI has been connected. I am using 4 digit extensions using in my network with Cisco Call Manager. I have created dial-peers with "destination-pattern ...." pointing to my Call Manager.
My service provider is sending only 3 digits to my router. Suppose if I am having a DID number of 28971234 for my extension 1234, I am getting only the last 3 digits ie 234 in my router. So in this case, router is not able to route the calls.
What shall I do in my router so that he will prefix 1 before 234 , make it 1234 and send it to Call Manager?