56034002 1/9/2006
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© 2006 Telular Corporation
These considerations should be coupled with the best RSSI indication obtainable (see section 2.7.1).
Care should be taken to insure that a large metal object such as a refrigerator or a metal cabinet is
not located on the opposite side of the wall.
If moving the Telguard to a different location is not practical, then you may need a cable and remote the
antenna in order to receive adequate radio signal strength. Pick a high, visually secure spot using the
guidelines below.
5.1.4.1 Tips for Improved Radio Signal Reception
•
The higher the antenna the better. So, start in the drop ceiling above the unit and proceed up from
there, to the roof if necessary.
•
Remember, the antenna should be as inconspicuous as possible for greatest visual security.
•
Try to keep the antenna away from sources of RF interference, including pumps, compressors,
ovens, etc., or where metal objects can shield it or otherwise block the cellular radio RF signal.
•
Place the antenna perpendicular to the ground, either right side up or upside down. Do not mount
the antenna horizontally.
5.1.5 Measure Received Signal Strength (RSSI) for Best Antenna Placement
Measure the received signal strength by putting jumper J10 "SHORTED". This switches the LEDs to
signal strength mode. Now, slowly move the unit or remote antenna to achieve maximum signal
strength. Pick the place where the most LEDs (up to four) are lighted.
LED Function Table – View RSSI Mode
RSSI Value
LED’s Lighted
RF dBm
NO SVC
LED 5 = slow flash, LED 4-2 = off
n/a
1
LED 5 = on, LED 4-2 = off
≤
-111 dBm
1½
LED 5 = on, LED 4 = slow flash
LED 3-2 = off
≥
-110 dBm
2
LED 5-4 = on, LED 3-2 = off
≥
-100 dBm
2½
LED 5-4 = on, LED 3 = slow flash
LED 2 = off
≥
-90 dBm
(Minimum signal
strength required)
3
LED 5-3 = on, LED 2 = off
≥
-80 dBm
3½
LED 5-3 = on, LED 2 = slow flash
≥
-70 dBm
4
LED 5-2 = on
≥
-60 dBm
Note: LED 1 = on indicates more than one cellular tower.
NOTE: If you cannot obtain a signal strength reading of 2½ (TWO LEDS ON SOLID AND THE
THIRD LED ON SLOW FLASH), you will probably need to move the unit and/or remote antenna
higher, or switch to a special antenna as described below.
5.1.5.1 Antenna Options
Antenna problems are unlikely unless the premises are located in a fringe network coverage area, in a
building below ground level, or in a metal structure. If you require a higher gain antenna or a longer
cable assembly please contact your Telular Sales Representative at 800-229-2326. Telular offers a
variety of high quality low loss, dual band antenna cables and high gain antenna.
5.2 S
TEP
2:
C
ONNECT
C/C
TO
T
ELGUARD
J
ACK
7
Plug the modular jack of the C/C-to-Telguard cable (supplied) from C/C to J7 on the Telguard.
5.3 S
TEP
3: P
ROGRAM THE
T
ELGUARD FOR ALARM TRANSMISSION
Confirm that the Telguard enables the host C/C to transmit alarm signals over the cellular radio network. The
Telguard is self-registering with the Telular Communication Center if the activation form was submitted prior to
installation. During the processing of the first alarm signal over the cellular network the Telguard will transmit all of the
programming parameters from the Telguard along with the information (central station number and account code)
from the alarm panel. Once this information is received, the Telular Communication Center will transmit a message
back to the Telguard indicating that the unit is registered. When this message is received the LED’S on the unit will
begin operating in normal mode; LED (1) one will be on solid.
