Multi-Tech Systems BL-Series - Manual (Page 160)

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MultiModemBL User Guide
Appendix K - Regulatory Information
Compliance with BABT Requirements
Approved for connection to telecommunications system specified in the instructions for use subject to
the conditions set out in them.
Warning: Interconnection directly, or by way of other apparatus, of ports 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.
This apparatus has been approved for the use of the following facilities:
• Auto-calling
• Loop disconnect and MF dialing
• Phone number storage and retrieval by a predetermined code
• Operation in the absence of proceed indication
• Automatic storage of last number dialed
• Tone detection-busy
• Auto clear from the originating end
• DTR dialing
• Modem
• PBX timed break register recall
Compliance with BS6305 Clause 6.2, BS6320 Clause 7.2, and BABT/SITS/82/
005S/D
a. The modem is suitable for connection to the Public Switched Telephone Network (PSTN)
provided by British Telecommunications plc or Kingston Communications (Hull) plc. Circuit
supply by British Communications, Mercury Communication, or Hull City Council. Only direct
exchange lines may be used, not shared service.
b. The modem is suitable for household, office, and similar general indoor use. It is not suitable for
use as an extension to a payphone.
c. BT lines supplied must support either loop disconnect or multifrequency tone signalling.
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 BABT.
ii. external control software or external control apparatus which cause the operation of the modem
associated call set-up equipment to contravene the requirements of the standard set out in
BABT/SITS/82/005S/D.