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Chapter 5: Troubleshooting Procedures
5-2 CSMIM-T1 Hardware Installation Guide
Refer to Table 5-1 for a description of the LEDs located on the front of
the CSMIM-T1.
Table 5-1 CSMIM-T1 Front Panel LEDs
LED(s) Description
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.