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• 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
European Low Voltage Directive
When correctly installed and maintained, the modem will present no hazard to the user. When
correctly installed the modem will be connected to the PSTN or a PW and to a Data Terminal
Equipment (DTE), whose modem connections comply with CCITT recommendation V28. The DTE
connections are therefore taken to be safe voltages (less than ± 30 volts).
Ports which are capable of connecting to other apparatus are defined as SELV. To ensure conformity
with EN41003, ensure that these ports are only connected to ports of the same type on other
apparatus.
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.
MA6
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