User's Manual

T1/FT1 Adapter Module Supplement
3-6
118943-B Rev 00
Table 3-2 describes the function of each T1/FT1 LED.
Table 3-2. T1/FT1 LEDs
Label Color Meaning
Red Alm Red Lights when the T1 port is in a red alarm state.
Yel Alm Amber Lights when the DSU/CSU has received a yellow
alarm from the T1 network.
Loop Amber Lights when the T1 interface is placed in loopback
mode.
Sync Green Lights when the T1 port is synchronized with the T1
network.