106
Pack the item to be returned securely, preferably
in the original packaging. All parts must be returned including line
cords, power supplies and original batteries. (Please note that we can
not take responsibility for goods damaged in transit).
Technical Information
Connection to the telephone network
This product is fully approved for connection to the BT telephone
network providing that it is used according to the instructions in this
guide.
All items of telephone equipment have a Ringer Equivalence Number
(
REN
) which is used to calculate the number of items that may be
connected to any one telephone line. The Airway Controller has a
REN of 1 per telephone line no matter how many handsets or Airway
sockets are registered to it. Any other instrument provided by BT
may be assumed to have a REN of 1 unless stated otherwise. A total
REN of 4 is allowed per telephone line. (For example, if one
telephone line is connected to one of the line sockets on the Airway
controller, and to three separate extension telephones each with a
REN of 1, then the total REN = 4).
Generally, Airway may be connected to switchboards which support
tone and pulse signalling and timed break recall. In the event of any
difficulties, please contact your switchboard service provider
If the power fails
In the event of a mains power failure the back-up battery keeps
your Airway working for around
30 minutes. After this time you will not be able to make or receive
telephone calls until the mains power is restored.
GENERAL INFORMA
TION
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