To adjust the ringing volume on the ITE 12A, turn the knob at the lower right corner on the face of the telephone. On the ITE 12P, ITE 12S, ITE 12SD, and ITE 12T ringing volume and ringing tone controls are on the left side of the telephone. This feature is available only on models equipped with a data option board. The telephone system provides voice response messages to notify the ITE user of features and call status. Internal calls are all calls made from numbers at Argonne to other numbers onsite.
External calls are calls made from Argonne to numbers offsite.
Placing Internal Calls Press the LINE button. Lift the handset. Dial the number. Placing External Calls Press the LINE button. Lift the handset.