Juniper Networks M20 manual Channelized T1 IQ PIC

M20 Internet Router PIC Guide

Channelized T1 IQ PIC

Software release	■	JUNOS 7.4 and later
Description	■	Ten T1 ports
	■ Power requirement: 0.15 A @ 48 V (7.2 W)
	■ Intelligent queuing (IQ) PICs support fine-grained queuing per logical interface.
	■ Channelization: T1, FT1, NxDS0
Hardware features	■	Data service unit (DSU) and channel service unit (CSU) functionality
	■ Ports configurable as clear channel T1 interfaces with 1.544-Mbps connectivity
	■ Framing: Superframe (SF or D4) and Extended Superframe (ESF)
	■ Supports B8ZS (bipolar 8-zero substitution) and AMI (alternate mark inversion) line coding
	■ Local, remote, and payload loopback testing
	■ ANSI T1.403 loopback support:
		■ Responds to embedded loopback commands upon receipt of an FDL command
		from remote end with loopup and loopdown at both line and payload level
		■ Insertion of loopback commands enables remote CSU/NIU/Smartjack to enter
		loopback and loopdown at both the line and payload level (ANSI and Telcordia)
	■	Inband loopback support:
		■ Responds to inband loopback commands at both the line and payload level (ANSI
		and Telcordia)

■ Insertion of inband loopback commands at both the line and payload level (ANSI and Telcordia)

■ Clocking support of external (line) and internal ■ Buildout support of the following ranges:

■ 0 through 132 (Line buildout is from 1 through 132 feet)

■ 133 through 265 (Line buildout is from 133 through 265 feet) ■ 266 through 398 (Line buildout is from 266 through 398 feet) ■ 399 through 531 (Line buildout is from 399 through 531 feet) ■ 532 through 655 (Line buildout is from 532 through 655 feet)

34■ Channelized T1 IQ PIC