Verilink C100 (880-502893-001) Product Manual - Manual (Page 41)

Chapter
6/15/99 Verilink C100 and C150 T1/FT1 CSU/DSU 4-1
4
LED Indicators and Diagnostics
Overview
The T-1 CSU/DSU is equipped with twenty-one LEDS, seve
loopbacks, a pattern generator/checker and two sets of monitor jacks
to help install and diagnose T-1 problems. The following sections
describe these items:
Figure 4-1 C100 Front Panel LEDs
Figure 4-2 C150 front panel LEDs