Juniper Networks M120 manual T1 PIC

M120 Internet Router PIC Guide

T1 PIC

Software release	■ JUNOS 8.0R2 and later (Type 1)
	NOTE: This PIC is not supported in JUNOS Release 8.1R1.

Description	■	Four T1 ports
	■ Power requirement: 0.08 A @ 48 V (3.7 W)
	■ Supports clear channel T1 per port (1.544 Mbps per channel)
	■ Supports attenuation up to –12 dBm
Hardware features	■	Per-port loop timing
	■ Onboard DSU functionality for T1 connectivity
Software features	■ ESF and SF framing
	■ B8ZS and AMI coding
	■ ESF CSU counters, WRT impairments, and CRC checking
	■ Local DS1 line loopback, remote line loopback
	■ Configurable clock source—internal or loop
	■	Encapsulations:
		■ High-Level Data Link Control (HDLC)
		■ Frame Relay
		■ Circuit cross-connect (CCC)
		■ Point-to-Point Protocol (PPP)
Cables and connectors	■	100-ohm RJ-48 connector
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

112■ T1 PIC