E1 PICs

Software features

Cables and connectors

Alarms, errors, and events

■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)

■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

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

■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

E1 PICs ■ 51

Juniper Networks M120 manual E1 PICs