OKI 4500 用户手册

Only one OKIFAX 4500 should be connected between any series
connected apparatus and the PSTN.

Difficulties may occasionally be experienced when making  calls from
other apparatus connected to the PSTN via the series apparatus. Such
difficulties may include:

(i)

Difficulty in making calls

(ii) Problems in telephone conversion being experienced by both

parties to the call

(iii) Such that any apparatus which forms part of the RBS or is

connected via it, is so connected that no signals of any kind may
be conveyed between that apparatus and a PSTN circuit or vice-
versa, except by means of other apparatus that does not materially
affect the electrical conditions presented to one another by that
apparatus and the PSTN.

Further information is contained in the proposed British Standard for
RBS to PSTN lines.

When the OKIFAX 4500 is in changeover mode, care must be taken
to ensure that you only connect the apparatus to telephone lines not
listed in the telephone directories issued by the Public Telephone
Network Operators.

The telephone number of this apparatus should not be issued to other
parties without instructions concerning the correct method of making
calls to this apparatus.

While operation may be possible initially, changes to or modernisation
of the network taking place in the normal course of events may result
in the apparatus being connected to a network service with which it

was not designed to be compatible. Failure of the apparatus to work
under these circumstances may not be the responsibility of the network
operator.

If such difficulties are experienced, please consult your OKIFAX
supplier.

A relevant branch system (RBS) is a telecommunication system other
than a public telecommunication system that is:-

(i)

Run under a license granted or having effect under section 7 of
the Telecommunications Act 1984.

(ii) Connected to one or more PSTN lines.

To request the installation of a socket for the connection of your
OKIFAX 4500 to the telephone network, you should send a postcard
containing the following information to your local BT Sales Office:

1)

The model no. of your fax machine: OKIFAX 4500

2)

The approval no. of your fax machine: BABT 608397

3)

The number of extension sockets you require.

4)

Your name, address and telephone number.

The card should be signed and dated.

Note: If your wiring does not belong to British Telecom, then it
is not necessary to apply to BT for socket installation.