It is not necessary to be in a pre-programmed pickup group to use this feature. This feature is for calling Campus University telephone numbers only. Requires a preprogrammed function button. When both telephones become idle, the telephone from which the call back was set will ring. Display indicates CB and the extension number call back was set against.
Connection is established when called party answers.
If you try placing a call back to a busy extension and hear a fast busy signal, a call back may have already been placed against the busy station, or you may already have placed a call back against another extension. The system allows only one call back to be activated by or placed against an extension at any one time. Call back is automatically canceled if the telephone that set the call back doesn't answer after approximately three rings. To Cancel Lift handset. Call is placed on hold.