Juniper Networks M20 manual LEDs Three bicolor per port Instrumentation counters

EIA-530 PIC

LEDs Three bicolor per port:

Instrumentation (counters)

■Data set ready (DSR):

■Green—DSR is detected or ignored

■Red—DSR expected but not present

■Data carrier detect (DCD):

■Green—DCD is detected or ignored

■Red—DCD expected but not present

■Resynchronization:

■Green—Keepalives are being received

■Red—Data terminal ready (DTR) toggled from low to high (resynchronization pulses are being sent)

■Per-port packet and byte counters

■Resynchronization counters:

■Number of resynchronizations initiated

■Time of last resynchronization

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