A trunk group is a group of circuits that are assigned the same dialing digits, either a telephone number or a DID prefix. Trunk groups can be assigned to VDNs or non-vector-controlled splits.

To add or change trunk group assignments, you must use the administration tool for your ACD system. You can only view trunk group assignments in CMS Supervisor, but you cannot change them from there. Therefore, you only need Read permissions for the Call Center Administration subsystem and for the affected trunk groups, splits, and VDNs.