CSL DualCom GSM Mk1 Installation Manual page 35

LED Indications (continued)
The Communication LEDs are Red and Yellow. See Fig 1 & 2.
Communication indications:
LED Off
LED On solid.
LED On + short off-blinks.
(3 off-blinks per sec)
LED rapid flash.
(On & Off 12 times per sec)
LED 15 medium flashes.
(On & Off 5 times per sec)
GSM Path Failure Indications:
The yellow Radio LED will flash to indicate the type of failure. If more than one
type of failure is detected, only one will be displayed.
1 flash SIM Card OK, GSM Radio OK, connection fault. Check aerial,
signal strength, and that the Service Provider is still providing a
service (paid the bill?).
2 flashes No response from GSM Radio module, check connections.
3 flashes There is no SIM Card fitted, or it is not fitted correctly.
4 flashes The SIM Card is locked. The PUK1 code is required to unlock it.
5 flashes The SIM Card PIN number is missing or wrong.
6 flashes The SIM Card SMS Message Centre telephone number is invalid.
7 flashes GSM Radio module fault detected by internal tests, replace unit.
APPENDIX 1
PSTN or Radio path not activated.
Path activated or dialling numbers.
Dialling completed, waiting for 'handshake'
from receiving equipment.
Handshake received, sending data to
receiving equipment.
Communications successful. Data
received correctly at receiving equipment.
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