Description
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- Four E3 ports
- Power requirement: 0.38 A @ 48 V (18 W)
- Fine-grained queuing per logical interface
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Hardware features
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- Clear-channel (34.368-Mbps) and subrate E3
- Unframed or ITU G.751 framing
- Data service unit (DSU) functionality
- Subrate and scrambling:
- Digital Link/Quick Eagle
- Kentrox
- HDB3 line encoding
- Full bit error rate test (BERT)
- Local and remote loopback testing
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Software features
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- Quality of service (QoS) per port: weighted round-robin
(WRR), random early detection (RED), weighted random early detection
(WRED)
- Simple Network Management Protocol (SNMP): E3 MIB, QoS
MIB
- Input policing and output shaping
- Provider-side rate limiting
- Full data link connection identifier (DLCI) range with
sparse channel numbering
- Per-DLCI queues with weighted deficit round-robin and
strict priority
- Encapsulations:
- High-Level Data Link Control (HDLC)
- Frame Relay
- Circuit cross-connect (CCC)
- Translational cross-connect (TCC)
- Point-to-Point Protocol (PPP)
- JUNOS release 7.0 or later is required to configure graceful
Routing Engine switchover (GRES).
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Cables and connectors
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- Standard E3 BNC coaxial cable interfaces
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LEDs
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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
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Alarms, errors, and events
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- Alarm indication signal (AIS)
- Equipment failure (does not affect service)
- Frame error
- Line code violation
- Loss of signal (LOS)
- Out of frame (OOF)
- Yellow alarm bit (A-bit) disagreements
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Instrumentation (counters)
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- Layer 2 per-queue packet and byte counters
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