Technical Information - BT BT3550 User Manual

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Within the 12 month guarantee period:
If you experience difficulty using the product, prior to returning your product, please read the
Help section beginning on page 43 or contact the BT3550 Helpdesk for assistance on
0800 218 2182*. Additional answers to Frequently Asked Questions are available from
bt.com/producthelp
In the unlikely event of a defect occurring, the helpdesk will issue a Fault Reference Authorisation
(FRA) number and instructions for replacement or repair. Please note you will need the FRA number
before returning the product. This does not affect your statutory rights.
Outside of the 12 month guarantee period:
If your product needs repair after the guarantee period has ended, the repair must meet the approval
requirements for connection to the telephone network. We suggest that you call our recommended
repair agents Discount Communications Ltd on 0800 980 8999.
Returning your phone
If the Helpline is unable to remedy your problem they will issue a Fault Reference Authorisation
number and ask you to return the product to your original place of purchase. Where possible, pack
the product in its original packaging. Please remember to include all parts, including the line cords,
power supply units and the original batteries.
For your records
Date of purchase:
Place of purchase:
Serial number:
For guarantee purposes proof of purchase is required so please keep your receipt.

Technical information

How many telephones can I 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 one telephone line. Your BT3550 has a
REN of 1.
A total REN of 4 is allowed. If the total REN of 4 is exceeded, the telephones may not ring. With
different telephone types there is no guarantee of ringing, even when the REN is less than 4.
Any additional handsets and chargers that you register have a REN of 0.
Only use approved base mains power supply, item code: 066771.
If you need some help, call us on 0800 218 2182* or go to bt.com/producthelp