TC8518 Rev 2.2 User Manual
6-1
Chapter 6
Troubleshooting
6.1
Introduction
Alarm conditions occur whenever an optical or electrical problem (fault conditions)
is detected by the TC8518. Under normal operation, all LEDs for the T1/E1 ports
with a valid signal present should be lit (solid green). All T1/E1 Ports with no
electrical signal present, should be Off.
T1/E1 Port 1-16
Figure 6-1 TC8518 T1/E1 Port Status
The Ethernet LINK/ACT LED is solid green when a port is connected and link
signal is present (the signal will flash when activity is present). The FULL/COL
LED will be lit depending on the incoming signal. (If the Ethernet signal is 10/
100Mbps and full duplex, the FULL/COL and 100M LEDs should be lit). If the
Ethernet connection is not 100Mbps or if it is half duplex, then both FULL/COL and
100M LEDs will be off.
Speed
Duplex/Collison
Ethernet Port 1,2,3
Link/Activity
Figure 6-2 TC8518 Ethernet Port Status
The Optical A and B (If unit is equipped with Optical Redundancy) LEDs should
be lit (Solid Green). The MGMT Port LEDs, The 100M LED will be lit if the signal
is 100Mbps or off if the signal is 10Mbps.