Juniper Networks M20 manual Status LEDs, one tricolor

M20 Internet Router PIC Guide

LEDs	■ Status LEDs, one tricolor:
	■ Off—Not enabled
	■ Green—Online with no alarms or failures
	■ Amber—Online with alarms for remote failures
	■ Red—Active with a local alarm; router has detected a failure
	■ Port LEDs, one per port:
	■ Off—Port is down
	■ Green—Link is established

Table 13: Optical Interface Support for Gigabit Ethernet IQ PICs with SFP

Parameter	1000Base-SX	1000Base-LX	1000Base-LH
Optical interface	Multimode	Single-mode	Single-mode
Transceiver type	SFP	SFP	SFP
Standard	IEEE 802.3—1998	IEEE 802.3—1998	Multivendor
			agreement
Maximum distance	62.5/125 MMF cable:	9/125 SMF cable:	9/125 SMF cable:
	656 ft/200 m	6.2 miles/10 km	43.5 miles/70 km
	50/125 MMF cable:	62.5/125 or 50/125
	1640 ft/500 m	MMF cable:
		1804.5 ft/550 m
Transmitter	770 through 860 nm	1270 through 1355	1480 through 1580
wavelength		nm	nm
Average launch power	–9.5 through 0 dBm	–11.5 through –3	–3 through +3 dBm
		dBm
Average receive	–17 through 0 dBM	–19 through –3 dBM	–20 through –3 dBM
power
Receiver saturation	0 dBm	–3 dBm	–3 dBm
Receiver sensitivity	–17dBm	–19 dBm	–23 dBm

52■ Gigabit Ethernet IQ PIC with SFP