Juniper Networks M20 - Manual (Page 24)

Status LEDs, one bicolor:
■ Off—PIC not enabled
■ Green—PIC is operating normally
■ Red—PIC has an error or failure
Port LEDs, one pair per port:
■ Link—If green, the port is online; if there is no light, the port is down
■ Activity—If flashing green, the port is receiving data; if there is no light, the port might
be on, but is not receiving data
LEDs
Table 5: Optical Interface Support for Gigabit Ethernet PICs
LH Transceiver LX Transceiver SX Transceiver PIC Type
43.5 miles/70 km
reach on 9/125
micrometer SMF 6.2 miles/10 km reach
on 9/125 micrometer
single-mode fiber
(SMF)
1804.5 ft/550 m reach
on 62.5/125 and
50/125 micrometer
MMF
656 ft/200 m reach on
62.5/125 micrometer
multimode fiber
(MMF)
1640 ft/500 m reach
on 50/125
micrometer MMF
Optical interface
1480 through 1580
nm 1270 through 1355
nm 830 through 860 nm Wavelength
–3 through +2 dBm –11 through –3 dBm –9.5 through –4 dBm Average launch power
–3 dBm –3 dBm –3 dBm Receiver saturation
–23 dBm (BER 1012)
for SMF –19 dBm –17 dBm Receiver sensitivity
24 ■ Gigabit Ethernet PIC (Quad-Wide)
M20 Internet Router PIC Guide: End-of-Life PICs