Cabletron Systems CSMIM-T1 manual LEDs Description, Status

Chapter 5: Troubleshooting Procedures

Refer to Table 5-1for 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	These LEDs indicate the number of modems installed
STATUS	(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	The CSMIM-T1 has three status indicators for each
STATUS	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.

5-2 CSMIM-T1 Hardware Installation Guide