RCA 25420 manual Connections and Setup on page

NOTE: To use four lines, you must have four telephone lines with unique telephone numbers. If you only have one telephone line, this phone will still operate, but only as a single line telephone.

Unit Initialization:

After you connect the power supply and Line 1 to the unit, the system automati- cally searches for and sets up a phone ID.

connected to the system. A maximum of 16 phones can be connected in the system.

The Phone ID for each phone must be a unique number from 01 to 16. If two phones on the same system share the same ID, one phone will have it’s ID erased and will need a new unique ID assigned before it can be used. Please see

Connections and Setup on page 14.

NOTE: In order to achieve full system operation (i.e. intercom, page, etc.), Line 1 must be connected and must be common to all phones connected to the system. Only other RCA 4-line models are compatible for full system operation.

You may connect up to 16 RCA 25420,25423, 25424 and/or 25425 phones to the system at one time. You may choose to share or privatize lines 2, 3 and 4.

10