- Cabletron Bridge/Router User's Guide

CHAPTER 4: USING THE LANVIEW LEDS
Page 22 BRIM-WT1 USER’S GUIDE
4.2 T1/FT1 PORT LEDS
The following LEDs indicate the status of the T1/FT1 port.
LOS (Loss of Signal)
• On - Indicates a loss of link at the T1/FT1 port. This condition
occurs when the T1/FT1 port receives 192 consecutive 0’s, this
should not happen under normal conditions. Check the T1 port
cable.
• Off - Signal OK.
TST (Test)
• On - Indicates that the T1/FT1 port is in the test mode.
• Off - Indicates that the T1/FT1 port is in the non-test mode.
YEL (Yellow Alarm)
• On - Indicates that the remote bridge has lost T1 Frame
synchronization. Check the remote bridge, T1 port cable, or T1
Frame Type setting.
• Off - Synchronization OK.
RED (Red Alarm)
• On - Indicates that the bridge has lost T1 Frame synchronization
with the remote bridge. Check the remote bridge, T1 port cable, or
T1 Frame Type setting.
• Off - Synchronization OK.