Oki FAX 740 - Manual (Page 74)

74
In order to prevent the misdirection of calls and network
interference, please ensure that all manually programmed
telephone numbers are correctly entered.
This apparatus is also approved for use as an extension
instrument to compatible PBXs. The supplier of the
apparatus should be consulted for an up-to-date list of PBXs
with which this apparatus is compatible.
The handset can be used to make “999” calls to the
Emergency Services.
The second telephone or answering machine must be
connected to the TEL 2 jack by means of the two-way
adaptor provided.
The apparatus is suitable for connection to PBXs which
return Secondary Proceed Indication. In these situations,
please insert pauses between the initial access digit and the
number to be dialled to the PSTN.
Series Connection
NOTE 1
The OKIFAX 740 causes a voltage drop of 1.35V when
passing a PSTN current up to and including 40mA dc. Do
not connect the OKIFAX 740 with apparatus which, with
associated wiring causes the aggregate of the voltage drops
to exceed a value of 2V at a PSTN line current of 40mA dc.
The 2V level indicates the maximum impairment that may
be introduced between the terminal apparatus and the
Network Terminal Point (NTP) of a Relevant Branch system
(RBS) containing the apparatus.
Only one OKIFAX 740 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) Prob lems in tele phone conversation being
experienced by both parties to the call