3Com T1/PRI manual A

ATROUBLE CLEARING
This appendix contains Dual T1/PRI Network Ap plication Card (NAC)
trouble clearing information.
Using the LEDs The Dual T1/PRI NAC has six LEDs on the front panel, three per span, that
indicate line signal conditions.
LED Purpose
CD1 & CD2 Carrier Detect indicators for span lines
ALRM1 & ALRM2 Alarm condition indicators for span lines
LPBK1 & LPBK2 Loopback indicators for span lines
{
{
Span 1
Span 2
CD1
ALRM1
LPBK1
CD2
ALRM2
LPBK2