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Precautions
This equipment should be used on PSTN lines requiring 2-wire Loop calling unguarded clearing
with Loop Disconnect or DTMF address signalling.
The equipment must be connected to direct extension lines and a payphone should not be
connected as an extension.
Operation in Power Failure
In the event of a power failure, two single line telephones connected to extension ports 01 and 09
will be directly connected to the following Exchange lines:
Exchange line 1 : extension port 01
Exchange line 4 : extension port 09
• Set the Dialling Mode (Tone or Pulse) of your telephone, according to the Exchange line.
• 999 and 112 can be dialled on the apparatus for the purpose of making outgoing calls to the BT
emergency (999) and (112) service.
Satisfactory performance can not be guaranteed for every allowed combination of host and
subsidiary apparatus.
999 and 112 can be dialled on the apparatus after accessing the Exchange line for the purpose of
making outgoing calls to the BT emergency (999) and (112) service.
During dialling, this apparatus may tinkle the bells of other telephones using the same line. this
is not a fault and we advise you not to call Fault Repair Service.
‘Prevention of access by user. This apparatus is intended to be accessible only to authorised
personnel. This apparatus must be installed in a locked room or similar environment, such that
user access is prevented. Failure to prevent such user access will invalidate any approval given to
this apparatus.’
Caution:
Do not push the PAUSE button more than twice following the initial access digit (or digits).
Failure to comply with this requirement may result in unsatisfactory operation.
Notice:
This PBX should only be used on B•T lines on which specific BT services or facilities are
provided.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type
recommended by the manufacturer.
Dispose of used batteries according to the
manufacturer’s instructions.
PSQX1708ZA-01E.QX 99.10.15 5:30 PM Page 4