ADEMCO VISTA 10, Руководство инженера

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14
REN
The REN is a guide to the customer as to the maximum number of items of apparatus
which may be connected simultaneously to the telephone line. The total REN is
obtained by adding up the REN values of each of the items of apparatus connected to
the exclusive line. Any BT approved instrument is assumed to have an REN value
of 1.0 unless it is otherwise marked.
The REN of the Vista 10 UK is 0.5. Where communication is made to a telephone
line, upon which additional telephone apparatus is connected, the total REN number
of the other apparatus must not exceed 2.5. This equipment is intended to be con-
nected to an exclusive line and no other apparatus should be connected.
Warning
The approval of this equipment for communication to the PSTN is invalidated if the
apparatus is subject to any modification in any material way not authorised by BABT,
or it is used with, or connected to:-
- Internal software that has not been formerly accepted by BABT
- External control software or external control apparatus which
causes the operation of this
equipment or associated call set up equipment to contravene the
requirements of the BABT standards. (BABT/SITS/82/005S/D).
Approval
Your attention is drawn to the following approval labels which are fixed to the out-
side and inside of the control cabinet.
This approval number must be quoted when applying to connect the product to the
PSTN, when ordering a telephone line or an extension to an existing line or in any
communication with the telephone supply authorities. These and other warning
labels must not be removed from the product.
Completion of Installation
Replace the control cabinet cover and tighten the two fixing screws. Restore the
mains supply to the control.
Programme the communication parameters before attempting communication.
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