User Guide
Page 13
... person to fax something to the normal line when you are done because outside callers who do not know that you hear a dial tone, the phone is properly installed. Only other 25423, 25424, 25425, 25413, 25414, 25415, 25403 and 25404 models are compatible for a dial tone. Connect the handset cord: ... errors. Check for a dial tone: Lift the handset and listen for full system operation. Use the data port to hook up to 16 RCA 25423, 25424 and/or 25425 phones to the jack on the side of intercom, page function, etc., DO NOT connect a DSL modem to work properly. Only other end...
... person to fax something to the normal line when you are done because outside callers who do not know that you hear a dial tone, the phone is properly installed. Only other 25423, 25424, 25425, 25413, 25414, 25415, 25403 and 25404 models are compatible for a dial tone. Connect the handset cord: ... errors. Check for a dial tone: Lift the handset and listen for full system operation. Use the data port to hook up to 16 RCA 25423, 25424 and/or 25425 phones to the jack on the side of intercom, page function, etc., DO NOT connect a DSL modem to work properly. Only other end...