BT Duet 20 – Issue 2 Edition 01 – 12.02.04 – 5957
10Technical information
How many telephones can you have?
All items of telephone equipment have a Ringer Equivalence Number (REN), which is used to calculate the number of items which may be connected to any other telephone line. Your BT Duet 20 has a REN of 1. A total REN of 4 is allowed. If the total REN of 4 is exceeded, the telephone may not ring. With different telephone types there is no guarantee of ringing, even when the REN is less than 4.
R&TTE
This product is intended for use within the UK for connection to the public telephone network and compatible switchboards.
This equipment complies with the essential requirements for the Radio Equipment and Telecommunications Terminal Equipment Directive 1999/5/EC.
Declaration of Conformance
Hereby, PDT, declares that this BT Duet 20 is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC. The Declaration of Conformance for the BT Duet 20 is published on the website: http://www.pdtuk.com/archive/certificates/duet/ d20cert0001.html
Switchboard compatibility
This product is intended for use within the UK for connection to public telephone network and compatible switchboards, which support tone dialling and timed break recall. If in doubt please consult your network service provider.