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
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
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)Problems in telephone conversation being experienced by both parties to the call
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