Multitech MultiModem MT2834ZPW, Руководство пользователя

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MT2834ZPW Owner’s Manual
78
d. REN (Ringer Equivalence Number):
The REN value of a unit is calculated from 3/n where n is the total
number of units which can be connected in parallel which will still
cause the standard bell (as defined in BS6305 Appendix D) to ring.
REN values of less than 0.3 cannot be assigned.
REN = 1
If a telephone or other device is connected in parallel with the
modem, the combined REN must not exceed 4. A BT-supplied
telephone may be assumed to have REN of 1.0 unless otherwise
noted.
The approval of this modem for connection to the British Telecom public
switched telephone network is INVALIDATED if the apparatus is subject
to any modification in any material way not authorized by BABT or if it is
used with or connected to:
i. internal software that has not been formally accepted by BABT.
ii. external control software or external control apparatus which cause
the operation of the modem associated call setup equipment to
contravene the requirements of the standard set out in BABT/SITS/
82/005S/D.
All other apparatus connected to this modem and thereby connected
directly or indirectly to the British Telecom public switched telephone
network must be approved apparatus as defined in Section 22 of the
British Telecommunications Act 1984.
The Approval Label is as follows:
APPROVED for connection to
telecommunications systems specified
in the instruction for use subject to
conditions set out in them
The REN number for this apparatus is 1.