TECHNICAL REFERENCE AND USER’S GUIDE
REV A
GSM GATEWAY
Dear KAREL Installer,
In order to maintain sound operation of the system, make sure the requirements
below, which are related to the environment in which the gateway will be installed, are
fulfilled.
♦
Make sure the upper screw by which the exchange will be hanged is at least 150 cm.
above the floor.
♦
Have your exchange installed in places, which are not exposed to direct sunlight,
and not humid, with an environmental temperature of 0-40oC and which should be
ventilated well. There should be a practical lighting in the room. The gateway should not
be exposed to effects of dust, vibration, oil and water.
♦
Devices that generate high frequency waves (such as welding machines, office
equipment such as computers and telex machines, air conditioners, TV sets) should not
be in the same room if possible, and they should be at least 3 meters away from the
gateway, otherwise.
♦
This module should be installed in a location inside the building but close to outer
walls, where GSM telephone network broadcast is received powerfully. In case lines
of different GSM operators are employed, signal levels for both of them should be
checked.
♦
Since frequently interrupted mains supply would affect normal operation of the
system, take care in making the power connection of the system special for the system.
II
CAUTION!
Since GT20 and GT10 GSM Gateways are electronic-based systems they contain modules
that carry high voltages, which could adversely affect environmental conditions. In this
regard, the requirements below should be fulfilled in order for your gateway not to
create any situation against you or the environment:
The device must not be disassembled by unauthorized
persons in any way.
The cover of the gateway cabinet should always be kept
closed.
Prior to hanging the gateway on the wall, one should
make sure screws are not defective.
Precautions must be taken in order to prevent any harmful
substances from leaking or spilling into the gateway or its
power adaptor in any way.
Failure in fulfilling those requirements may result in vital hazards!
GT20-10 TTMK/ÝNG - REV A 30/01/2003
KAREL reserves the right to make modifications in product features mentioned in this
document for development and improvement purposes, without prior notice. Individual
products may possess characteristics different from those mentioned in this document,
according to their software and hardware versions.
I