6170 BT Prelude 20 UG [2] 14/6/04 3:34 pm Page 16
BT Prelude 20 Headset – Edition 2 – 14.06.04 – 6170
16Technical 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 Prelude phone 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 not guarantee of ringing, even when the REN is less than 4.
BT accessories and replacement items
For a full range of accessories and replacement items for BT products please call 0870 240 5522,
or visit:
For your records
Date of purchase:
Place of purchase:
Serial number:
For guarantee purposes proof of purchase is required so please keep your receipt.