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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.
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Configurable clock source: Internal or loop
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Encapsulations:
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High-Level Data Link Control (HDLC)
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Frame Relay
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Circuit cross-connect (CCC)
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Point-to-Point Protocol (PPP)
Software features
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Two versions:
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Four RJ-48 connectors (one per port)
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Four coaxial connectors
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Custom 10-ft (3.05-m) posilock to BNC male cable, separate Rx and Tx
Cables and connectors
One tricolor per port:
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Off—Not enabled
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Green—Online with no alarms or failures
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Amber—Online with alarms for remote failures
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Red—Active with a local alarm; router has detected a failure
LEDs
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Alarm indication signal (AIS)
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Bipolar violations
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Excessive zeros
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Far-end block errors (FEBE, E-bit errors)
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Loss of frame (LOF), Loss of signal (LOS)
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Local and remote loopback diagnostics
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Yellow alarm bit (X-bit) disagreements
Alarms, errors, and
events
E1 PICs ■ 51
E1 PICs