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USC423A
868MHz GSM Alarm System
User Manual
1. Introduction
The USC423A GSM Alarm System is a control panel that is compatible with
other H-net security devices from Everspring, such as wireless sensors,
remote controls, tags, and keypad. With this system you can achieve a better
control of your home security to make your life safer and easier than ever.
2. Appearance
Figure 1 USC423A Appearance
3. Operation
When a key is pressed, the LED will light up and a key tone will sound (when Key
Tone is enabled).
3-1 Definition of LEDs:
LED
Indication
GSM Signal LED
Flashing once every second: Registering with
host device
Flashing once every three seconds:
Successful registration with host device
Off: No AC power
[REC] LED
Flashing: Recording / On Playback /
Monitoring
On: Speaker playback
[ARM] LED
On: Arm Mode
Flashing: Arm Mode Exit Delay
[PARM] LED
On: Partial Arm Mode
Flashing: Partial Arm Exit Delay
[DISARM] LED
On: Disarm Mode
Flashing: Waiting for Code Learning / Test
Mode
[ALARM] LED
Flashing: Undergoing Host Alarm or memory
has been triggered
[TEL] LED
On: Using GSM Telephone
Flashing: GSM sending SMS
[RF ID] LED
On: Reading Tag ID
