Software release

• Junos OS Release 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)

Software features

• Quality of service (QoS) per channel: weighted round-robin (WRR), random early detection (RED), weighted random early detection (WRED)
• SNMP: T1 MIB and DS0 MIB
• Dynamic, arbitrary channel configuration
• Full bit error rate test (BERT) patterns at T1 and DS0 levels
• 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

• 120-ohm RJ-48C connector (female)

LEDs

One tricolor per port:

• Off—Not enabled
• Green—Online with no alarms or failures
• Yellow—Online with alarms for remote failures
• Red—Active with a local alarm; router has detected a failure

Alarms, errors, and events

• Alarm indication signal (AIS)
• Remote defect indication (RDI)
• Loss of frame (LOF)
• Loss of signal (LOS)
• Bipolar violation (BPV)
• Excessive zero (EXZ)
• Line code violation (LCV)
• Error seconds (ES)
• Severely errored seconds (SES)
• Severely errored frames (SEF)
• Bit error event (BEE)

Instrumentation (counters)

• Layer 2 per-queue and per-channel packet and byte counters
• 24–hour history or error counter updated at 15–minute intervals