SNR
LINK on
Blink
Bad Signal/noise ratio
Off
Good Signal/noise ratio
LINK off
Blink
Link activation in progress
Off
No link
ERR
LINK on
Blink
A packet with error
received
Off
No error
LINK off
On
Fatal error
ETHERNET ( channels 1 and 2)
LINK
On
Valid Ethernet link detected
Off
Ethernet link not detected
Blink
Traffic exchange
100M
LINK on
On
100Base-TX link detected
Off
10Base-TX link detected
FD/C
LINK on
On
Full duplex
Off
Half duplex
Blink
Collision detected
Е1
LINK
On
Signal from Е1 equipment detected
Off
No signal from Е1 equipment
SYNC
On
Frame synchronization detected or
Unframed mode
Off
Frame synchronization not detected
TEST
On
Test mode
Off
Operation mode
1.10.2 Rear panel and connectors
Layout of connectors and switches on the rear panel of the Sigrand SG-
16BG modem
Figure 2
14
