I have a situation that I don't know an easy solution for. We have a SIP trunk between CUCM (6.1) and an ITSP, this SIP trunk will be our main gateway for US LD calls and international calls, we also have ISDN as backup. ITSP requires us to strip off 011 when sending them SIP invite for international calls, but our ISDN provider expects us to send 011, the main route-list has SIP trunk and ISDN gateway. How can I configure a route pattern such that when an international call is routed to SIP trunk "011" will be stripped, but when international call is routed to ISDN, "011" will not be stripped? We expect employees to always dial 011 from their desktop IP-phone.
You have to open route list and under route list you got route groups (think you should create specific RG to achive your settings) and then you can put digit manipulation there.
Make sure it will be new route group assigned to RL with this specific digit manipulation.
To make it easier if you dont have testing CUCM create new RL and new RG with let say patter to specific number just for testing.