Cisco Call Manager + Asterisk integration

Hello, I’ve been trying to create a sip trunk from Cisco Call Manager 4.2 to asterisk, but I believe asterisk wont connect unless a username is specified but Cisco call manager does not offer a place for a username. I dont understand where I should go from here.

thank you

The only user name that CCM needs is the called number. I think you are looking for a problem that doesn’t exist.