Software release

• Junos OS Release 8.0R2 and later (Type 1)

Note: These PICs are not supported in Junos OS Release 8.1R1.

Description

• Four E1 or coaxial ports
• Power requirement: 0.08 A @ 48 V (3.74 W)
• Two versions:
  • 4-port, 120-ohm, RJ-48
  • 4-port, 75-ohm, coaxial
• Onboard DSU functionality for E1 connectivity

Hardware features

• High-performance throughput on each port at speeds up to 2.048 Mbps, full duplex
• Maximum transmission units (MTUs) of up to 4500 bytes
• Per-interface diagnostics and loopback control
• Per-interface shaping on output
• Per-interface alarm and event counting and detection
• HDB3 line coding
• 4-bit CRC for G.704 framed mode
• Per-port loop timing
• Balanced and unbalanced modes
• Packet buffering, Layer 2 parsing
• Full bit error rate test (BERT)

Software features

• Integrated support for G.703 unframed mode and G.704 framed mode with CRC; this feature is user-configurable

  Note: The G.704 implementation supports speeds slower than 2.048 Mbps; multiple channels within a single E1 interface are not supported.

• 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

• Two versions:
  • Four RJ-48 connectors (one per port)
  • Four coaxial connectors
• Custom 10-ft (3.05-m) posilock to BNC male cable, separate Rx and Tx

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)
• Bipolar violations
• Excessive zeros
• Far-end block errors (FEBE, E-bit errors)
• Loss of frame (LOF), Loss of signal (LOS)
• Local and remote loopback diagnostics
• Yellow alarm bit (X-bit) disagreements