BT BT3440 - Page 54

General information
55
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Technical details
How many phones can I have?
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(REN), which is used to calculate
the number of items which may be
connected to any one telephone
line. Your BT3440 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
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guarantee of ringing, even when the
REN is less than 4.
Any additional handsets and
chargers that you register have
a REN of 0.
Connecting to a switchboard
Switchboard compatibility
This telephone may be connected
to most types of switchboard,
however in the event of any
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Service Provider.
Recall (R)
Recall is used when connected to
certain switchboards/PBXs and some
BT Calling Features, or those services
available via your network provider.
The BT3440 supports timed break
recall but not earth loop recall.