Connections and Setup
Before Your Begin
Parts Checklist
Make sure your package includes the items shown here.
Telephone Jack RequirementsTo use this phone, you will need an RJ11C (for a single line) or a RJ14C (for two lines) type modular phone jack, which might look like the one pictured here, installed in your home or office. If you don’t have either modular jack, call your local phone company to find out how to get one installed.
VERY IMPORTANT: 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 25420, 25423, 25424, 25425, 25413, 25414, 25415, 25403 and 25404 models are compatible for full system operation. Connecting phones other than the 25420, 25423, 25424, 25425, 25413, 25414, 25415, 25403 and 25404 to Line 1 may inhibit the intercom and paging operations.
For proper operation of intercom, page function, etc., DO NOT connect a DSL modem to Line 1. To transfer a call from one station to another, the two stations
should be connected to the same line.
Important Installation Information
•Never install telephone wiring during a lightning storm.
•Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.
•Never touch
•Use caution when installing or modifying telephone lines.
•Temporarily disconnect any equipment connected to the phone such as faxes, other phones or modems.
8