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The Auteldac 102 intrinsically safe mine
push button telephone forms part of a system complete
with it’s surface interface.
It is
purpose-designed for underground coal mining
installation and is tough, weather resistant and built
to withstand operator abuse in environmental extremes.
The Auteldac 102 is made from conductive glass filled
polyester with a robust handset and armoured steel or
curly cord. The piezo electric ringer gives over 85 dB
SPL for ringing and emergency calls.
[ Typical Telephone System]
Operation is simple, with finger guide
holes to eliminate mis-dialing even when wearing thick
gloves. A dedicated ‘EMERGENCY’ button operates an alert
(to an Emergency Desk, if fitted), or can be
pre-programmed to dial an emergency number. Internal
links provide three recall options and LD/MF dialing to
enable automatic connection via a surface interface to
PABX and PAX/PBX surface exchanges. All exchange
facilities can be accessed when using the star, hash and
recall buttons when tone dialing is selected. The recall
button provides all the usual
facilities.
Time-out is standard and should the
handset be left off-hook, the Auteldac 102 will
automatically revert to normal on-hook status after a
period of three minutes (programmable).
The all
electronic internal module is conformal coated for
reliability. An easily accessible Ni-MH battery provides
the internal operating supply and is trickle charged
from the surface interface down the telephone
line.
Connection is via a simple twisted pair
cable that can be contained within a multi-core if
required. Up to three telephones can be connected for
"party line" working from the line pair by a four-core
link. An auxiliary (‘AUX’) output allows connection of
additional beacons or ringers powered either from their
own supply or the telephone battery (subject to
certification
conditions).
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