Juniper Networks M120 manual Per-port SONET/SDH framing

M120 Internet Router PIC Guide

Software features	■ Optical diagnostics and related alarms
	■ Per-port SONET/SDH framing
	■	Link aggregation
	■ Alarm and event counting and detection
	■ Dual-router automatic protection switching (APS)
	■ Multiprotocol Label Switching (MPLS) fast reroute
	■	Encapsulations:
		■ High-Level Data Link Control (HDLC)
		■ Frame Relay
		■ Circuit cross-connect (CCC)
		■ Translational cross-connect (TCC)
		■ Point-to-Point Protocol (PPP)
Cables and connectors	You can install any transceiver supported by the PIC. For information about installing and
	removing transceivers, see the PIC and Transceiver Installation Instructions.
	■ Duplex LC/PC connector (Rx and Tx)
	■ Optical interface support—See Table 26 on page 89 and Table 27 on page 90
	NOTE: To extend the life of the laser, when a PIC is not being actively used with any valid
	links, take the PIC offline until you are ready to establish a link to another device. For
	information about taking a PIC offline, see the request chassis pic offline command in the
	JUNOS System Basics and Services Command Reference.
LEDs	One tricolor per port:
	■ 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

88■ SONET/SDH OC3/STM1 (Multi-Rate) PICs with SFP