BT DECTfax Fax machine and digital telephone system User Manual page 45

Voltage Drop
The voltage drop introduced between the PSTN and the
associated telephone is 2.0 Volts so therefore no additional series
equipment may be connected. The introduction of this voltage
drop may occasionally cause difficulties in making calls from the
associated telephone or problems in telephone conversation
being experienced by both parties to the call.
While operation may be possible initially, change to or
modernisation of the network taking place in the normal course
of events may result in the apparatus being connected to be
compatible, failure of the apparatus to work under these
circumstances may not be the responsibility of the network
operator.
In the unlikely event of such problems occurring, the user
should contact the supplier or maintainer of the apparatus.
Note
The definition of RBS (Relevant branch system) for PSTN lines
is given in BS6789 section 6.1 (1986) clause 2.4.
Connecting to switchboards
Your DECTfax is approved only for use with a compatible
switchboard including those which do not provide secondary
proceed indication.
If you do have a compatible switchboard, it cannot be guaranteed
that the DECTfax will operate correctly under all possible
conditions of connection.
If you have any difficulties, contact BT on Freefone 0800 800 152
for business Customers or Freefone 0800 800 150 for
residential customers (9am to 5pm Monday to Friday).
Warning
This equipment is not designed for making telephone calls when
the power fails.
Alternative arrangements should be made for access to
emergency services.
Safety warnings
Interconnection circuits should be such that the equipment
1
continues to comply with the requirements of 4.2 of EN 41003
for TNV circuits and 2.3 of EN 60950 for SELV circuits, after
making connections between circuits.
Interconnection directly, or by way of other apparatus, of ports
2
marked "Safety Warning. See instructions for use" with ports
marked or not so marked may produce hazardous conditions
on the network. Advice should be obtained from a competent
engineer before such a connection is made.
When you operate this equipment, the electrical mains socket
3
should be near the equipment and be easily accessible.
Warning
To prevent fire or shock hazard, do not expose this product to
rain or any type of moisture.
How to connect the mains lead to a plug
Your apparatus comes complete with fitted plug. If however, it
becomes necessary to fit an alternative mains plug, the following
instructions must be adhered to.
Note
The wires in the mains lead are coloured in accordance with the
following code:
Blue: Neutral
Brown: Live
Read the instruction carefully before connecting the mains lead
to a plug. If in doubt, consult a qualified electrician.
As the colours of the wires in the mains lead of the apparatus
may not correspond with the coloured markings identifying the
terminals in your plug, proceed as follows:
• The wire which is coloured blue must be connected to the
terminal which is marked with the letter N or coloured black.
• The wire which is coloured brown must be connected to the
terminal which is marked with the letter L or coloured red.
Technical information
43