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Regulatory Notices
C-16
Identification of Ports
The modems is fitted with a multi-way connector which provides the power and digital
signals to the modem. The RJ11 style connector provides the interface to PSTN.
Network Connection
The modem is supplied with a lead terminated with a BT modular plug. The connections are
as follows:
(PSTN) A Wire 2 B Wire 5
Dialing Modes
BS6789:Section 3.1 defines three dialing modes. Modes 2 and 3 cover autodialing devices
which play recorded messages. Mode 1 provided by this apparatus may be used for all non-
emergency (non-999/non-112) calls. Mode 1 specifies that the device must drop the line
(hang-up) within 1 minute if it receives the standard BT tones for Number unobtainable,
Busy, Equipment engaged or special information. Calls not covered by modes 1,2 or 3 must
not be made.
The modem in this unit, since it uses mode 1, cannot be, must not be, used for emergency
(999/112) calls.
Available Facilities
This apparatus has been approved for the use of the following facilities:
· Data transmission speeds up to 33.6kbps and reception speeds up to 56kbps
· Operation to CCITT V21, 22, 22bis, 23, 27, 29, 32, 32bis, 34 signalling rates
· Automatic call initiation
· Detection of initial proceed indication (dialtone) and secondary dialtone
· Operation in the absence of initial proceed indication (blind dialing)
· Automatic dialing using dtmf (tone) or loop disconnect signalling (pulse dialling).
· Tone detection of Dialtone, Ring tone, Busy, Equipment busy, Number
unobtainable
· Automatic answering
· Stored and Last Number dialing
· Timed break register recall
Any other usage will invalidate the approval status if as a result, the apparatus then ceases to
conform to the standards against which they were tested and approved.
Additional Features
Since this modem is capable of storing telephone numbers for autodialing, you are required
by BS 6789:Section 3.1 to ensure that all stores have been correctly entered. Commands are
provided for this purpose.