Use the Attendant Control of Trunk Group Access feature to allow the attendant to control outgoing and two-way trunk groups. The attendant usually activates this feature during periods of high use. This is helpful when an attendant wants to prevent telephone users from calling out on a specific trunk group. Some reasons are to reserve a trunk group for incoming calls or for a very important outgoing call.

This feature also prevents telephone users from directly accessing an outgoing trunk group that the attendant has controlled.