![](/images/new-backgrounds/1295442/29544221x1.webp)
Connections & Setup
If you have four
Adapter/coupler LINE 1 + 2
Adapter/coupler LINE 3 + 4
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 automatically searches for and sets up a phone ID. To set your own Phone ID, or change your phone ID, follow the steps in the Phone ID section.
You may connect up to 16 RCA 25404 and/or RCA 25403 phones to the system at one time. Features like intercom, page and call transfer may be used among the units, but Line 1 must be common for all 25404 or 25403 units for these features to work properly. You may choose to share or privatize lines 2, 3 and 4.
11