APPENDIX 1
LED Indications (continued)
The Status LED (DualCom GSM Mk2 only). See Fig 2.
Flashing on/off Registered on GSM network. Not triggered.
(1 off-blink per sec) All OK on the radio network.
Flashing on/off Registered on GSM network. Not triggered.
(2 off-blink per sec) All OK on the radio network.
On solid Powered but no network detected or
registering in progress.
Off No power to internal radio modem
The Communication LEDs are Red and Yellow. See Fig 1 & 2.
These give an indication of Power-up, Input Learning, NVM Faults, Communi-
cation Progress and Communication Faults.
NVM Fault Indications:
LEDS alternate flash - slow. NVM is faulty, or fitted incorrectly.
(Red, yellow, red, yellow ...)
LEDS alternate flash - fast. NVM is the correct type and is working,
(Red, yellow, red, yellow ...) but has been incorrectly programmed.
(On & Off 5 times per sec)
Input Learning Indication:
When the Dualcom is ‘learning’ the quiescent (non-active) state of its inputs,
the Red & Yellow Communication LEDs will flash, 4 Red...4 Yellow...4 Red...etc.
Up/Downloading indications:
Radio or PSTN LED On
+ 3 short off-blinks. Remote programming of NVM in progress.
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General