Cabletron Systems CSMIM-T1 Manual De Usuario

Chapter 5: Troubleshooting Procedures

 for a description of the LEDs located on the front of 

the CSMIM-T1.

MODEM CONFIG 
STATUS

These LEDs indicate the number of modems installed 
(8, 16, or 24). An indicator is green if all the modems 
in its group are good. An indicator is amber if one 
modem in its group is bad.

MODEM PORT 
STATUS

The CSMIM-T1 has three status indicators for each 
modem port (1 through 24):
CD - Data Carrier Detect is a green LED and is on 
when the carrier has been detected on the telephone 
line on the corresponding modem.
TX - Transmit Data is a green LED that flashes to 
indicate the corresponding modem is transmitting 
data.
RX - Receive Data is a green LED that flashes to 
indicate the corresponding modem is receiving data.

NETWORK STATUS

TEST - RED network TEST indicator is ON when the 
T1 Network Interface is looped back. Loopback tests 
are activated either locally by the user or by the 
telephone company.
SYNC - GREEN SYNC indicator is ON when the T1 
engine is properly synchronized with the received 
network signal and is receiving proper framing 
information.
LOS - RED LOS indicator is ON when the T1 engine 
is detecting no signal (pulses) on the network 
interface receiver. When a LOS condition exists, the 
T1 engine transmits unframed all one (AIS) to the 
network.