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E1 PICs

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Figure 2: Left: E1 RJ-48 PIC; Right: E1 Coaxial PIC

Software release

JUNOS 6.4 and later (Type 1)

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-configurableThe 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

Amber—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

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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-configurableThe 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 Amber—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