■
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)
Software features
■
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
Cables and connectors
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
LEDs
■
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
Alarms, errors, and
events
E1 PICs ■ 51
E1 PICs
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