Installation_Guide | 1 - Installation Guide | 6
Table 3: Descriptions of S20 Front Panel
LED
Indication
Status
Description
On
The power is switched on.
POWER
Power
status
Off
The power is switched off.
Blinking
The system is running properly.
SYSTEM
System
status
Static/Off
The system goes wrong.
Static
Linked normally.
Blinking
In communication.
WAN
WAN
status
Off
Off-line.
Static
Linked normally.
Blinking
In communication.
LAN
LAN
status
Off
Off-line.
Green: static
The analog phone is idle.
FXS
Green: blinking
The analog phone is busy.
Red: static
The GSM/3G/4G Trunk is idle.
Red: blinking slowly No SIM card.
GSM/3G/4G
Red: blinking rapidly The GSM/3G/4G trunk is in use.
Orange: blinking
The BRI line is disconnected.
BRI
Orange: static
The BRI line is connected or in use.
Red: static
The PSTN line is idle.
1-4
(Telephony
ports)
FXO
Red: blinking slowly No PSTN line is connected to the FXO port.
