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Guardall WINDSOR SERIES 300i Manual

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Installation & Programming Guide — 37
This equipment is suitable for use on direct telephone line operated by British
Telecommunication PLC, Mercury Communications PLC and Kingston Communications
(Hull) PLC where the specific services of loop-disconnect (pulse) and/or multi frequency
(tone) dialling are available.
The communicator may be connected to direct exchange lines or Relevant Branch
Systems (RBS) as defined in BS6789 : section 6.1 clause 2.4. It is not suitable for
connection to PABX systems or for use as an extension to a payphone.
It is intended for use in normal office, household and similar indoor use. It should not be
used in damp or humid environments such as bathrooms or swimming pools.
The output power is fixed and cannot be changed by the user.
The approval mark attached to the communicator indicates that it alone carries the BABT
approval. No approval is conferred on the host alarm panel or any other connected
equipment and the label must not be removed or transferred to any other equipment. A
copy of the approval label may be attached to the telephone line cable. The text of the
approval mark is reproduced below
APPROVED for
connection to telecommunication
systems specified in the
instructions for use and subject to
the conditions set out in them
Ringer equivalence number (REN)
REN is a customer guide to indicate the maximum number of apparatus that may be
connected simultaneously to a single telephone line without affecting the bell (or tone)
ringing characteristics of the items connected.
To calculate the maximum number of items which may be connected to a single exclusive
telephone line, add all the REN values of the connected equipment. Telephone lines
which are not marked with a REN value are assumed to have a REN of 1.0.
If a REN of 4 is marked on the apparatus then no other apparatus may be connected
simultaneously unless that apparatus has been marked with a REN of 0. The maximum
REN value allowed on any combination of simultaneously connected apparatus is 4.0.
Because of the wide spread of characteristics a guarantee of successful operation in an
installation of mixed types of equipment may not be given by Guardall. The voltage drop
introduced by the communicator, where an auxiliary port is provided into the loop
connection between the main apparatus and the PSTN at 40mA line current, will not
exceed 200mV. The communicator must not be used with any equipment which when
introduced by any relevant wiring, causes a voltage drop exceeding 2 V.
… 37 …


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