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Mining Communications Solutions The Loudspeaking Mine Telephone (LST) is a completely self-contained battery-powered
communication unit that provides loudspeaker paging and a handset party line
conversation over a twisted telephone line.
Installation and maintenance are simple due to the single plug-in amplifier board and the
battery power supply used in the LST. The mode of operation is also simple, greatly
improving ambient noise rejection. An anti-side tone circuit provides improved reception,
particularly in areas with high ambient noise. Individual volume controls are also provided
for the speaker and handset receiver. The audio is of high quality; voices sound clear and
natural, not harsh or metallic.
The GAI-Tronics Mine Dial/Page Telephone System combines the convenience of a telephone
station with paging capabilities in gaseous or dusty locations that are too hazardous for
standard telephone equipment. The system is rated as "permissible".
The interface assembly is electrically connected between the station and the telephone
switchboard. Each interface assembly is connected to a separate line of the telephone
exchange. The mine dial/page telephone system is designed as an alternative to the mine
pager system and other communication systems (such as the "Pager" or "Loud-Speaking
Telephone") that lack privacy and multiple conversation capabilities.
All functions take place over a single pair of wires between the station and the interface.
Using a mine dial/page telephone station, a person can access any station or any conven-
tional telephone connected to that switchboard. If the switchboard is tied into the public
telephone system, an individual can call out or receive calls from any public telephone.
Personnel in hazardous areas have direct contact to all non-hazardous areas with extension
telephones without the purchase of additional communications equipment for these non-
hazardous areas.
Rugged Industrial
Telephones
Loudspeaking Telephones
Mine Dial
GAI-Tronics industrial telephones include standard items such as a proximity
detecting hookswitch with no moving parts and a sealed keypad to keep
out dust, dirt and moisture. The sealed electronic ringer also prevents
contaminants from entering the housing. Other standard features are noise
canceling microphones and volume control handset. Theses telephones are fully
line powered, and do not require an internal battery.
The 246 indoor and 256 outdoor series Industrial Telephones are constructed of a
high-impact, anti corrosive enclosure with an industrial strength six- foot Hytrel®
handset cord. The Hytrel® cord is unique that it can withstand 250 pounds of pull
strength and remains flexible in the most extreme temperatures, unlike PVC cords
that are limited to 40 pounds of pull strength and begin to deteriorate at -14°F
temperature range.
Mining Communications Solutions
GAI-TRONICS
®
A Hubbell Company GAI-Tronics Model 351-001 Division 2 Industrial Telephones are approved for selected Division 2
areas and offer a high-quality, durable telephone for safe communications in your facility.
GAI-Tronics Model 351-001 Outdoor Industrial Telephones provide fully-functional
communications that are approved for use in Class I, Division 2, Groups A, B, C, D; Class II,
Division 2, Group G and Coal Dust; and Class III classified areas.
GAI-Tronics 260/270 Series Intrinsically-Safe Telephones include safety barriers, allowing the
telephones to obtain low energy levels, eliminating the possibility of a spark or explosion
occurring. The barrier is placed in an indoor or outdoor, non-hazardous location up to one
mile from the telephone. In contrast to explosionproof telephones, which are designed to
contain an explosion, our Intrinsically-Safe Telephones limit input power to prevent an
explosion from occurring. Intrinsically-Safe Telephones
use standard telephone cable and do not require conduit.
Housed in glass-reinforced polyester, these units offer
superior resistance to chemicals, solvents, salts, and
extreme temperatures. The metallic keypad is fully sealed
to prevent entry of dirt, contaminants and water. The
handset cord is molded of thermoplastic elastomer to
provide outstanding performance and long life. The non-
movable handset cradle uses a proximity-detecting switch
to take the phone off-hook.
Hazardous Area Telephones
SmartSeries Page/Party®
SmartSeries system field devices utilizes the latest technology in data commu-
nications to significantly improve system integrity and functionality. By interfac-
ing with the SmartSeries control unit, the devices exchange fault and activity
messages. The SmartStatus feature provides a graphical display of the entire
communication system, making the system very user-friendly.
Current faults are displayed or logged, depending on the system configuration,
to provide maintenance personnel a means to diagnose equipment problems.
For example, a handset left off-hook can degrade an audio channel. To alleviate
this problem, the stations report this condition, and are programmed to go
electronically on-hook after a pre-set time period configured at start up.
Other system functions monitored by the control unit include use of the page
line, integrity of the system cable, and the functionality of the station amplifier and
associated speakers. Supervision of these features significantly reduces the costs
associated with maintaining your communication system.
SmartSeries systems are fully adaptable to a variety of facility sizes, from a few handsets to
several hundred. Using SmartLink technology, multiple independent communication systems
can be interfaced and monitored from a central location.
Mining Communications Solutions
GAI-Tronics
®
- USA Toll Free: 1 (800) 492-1212 Tel: (610) 777-1374 Fax: (610) 796-5954 www.gai-tronics.com
GAI-Tronics® Limited, UK Tel: +44 (0)1283 500500 Fax: +44 (0)1283 500400 www.gai-tronics.co.uk
GAI-Tronics
®
S.r.l, Italy Tel: +39 02 48601 460 Fax: +39 02 4585 625 www.gai-tronics.it
GAI-Tronics® - Malaysia Tel: +60-3-8945-4035 / 8945-7348 Fax: +60-3-8945-4675 www.gai-tronics.com
Austdac - GAI-Tronics® - Australia Tel: 011-61-28-851-5000 Fax: 011-61-29-899-2490 www.austdac.com.au
Quality Management Systems Certified - ISO9001:2000
Pub. 050403 rev 1-2007
The policy of GAI-Tronics
®
is one of continuous improvement, therefore the company reserves the right to change specifications without notice