Software release

• Junos OS Release 6.2 and later (Type 1)

Description

• One OC12 port
• Power requirement: 0.23 A @ 48 V (10.8 W)
• Fine-grained queuing per logical interface
• Channelization: OC3, DS3, DS1, DS0

Hardware features

• Subrate and scrambling:
  • Digital Link/Quick Eagle
  • Kentrox
  • Larscom
  • ADTRAN
  • Verilink
• Packet buffering, Layer 2 parsing
• M13/C-bit parity encoding
• DS3 far-end alarm and control (FEAC) channel support
• Local and remote loopback testing

Software features

• Quality of service (QoS) per channel: weighted round-robin (WRR), random early detection (RED), weighted random early detection (WRED)
• Simple Network Management Protocol (SNMP): OC3 MIB, DS3 MIB, T1 MIB
• Dynamic, arbitrary channel configuration
• Full bit error rate test (BERT)
• Encapsulations:
  • Circuit cross-connect (CCC)
  • Translational cross-connect (TCC)
  • Frame Relay
  • High-Level Data Link Control (HDLC)
  • Point-to-Point Protocol (PPP)

Cables and connectors

• Duplex SC/PC connector (Rx and Tx); single-mode fiber
• SONET/SDH OC12/STM4 fixed transceivers:
  • Intermediate reach (IR-1)

  Optical interface specifications—see SONET/SDH OC12/STM4 Optical Interface Specifications

LEDs

One tricolor per port:

• Off—Not enabled
• Green—Online with no alarms or failures
• Yellow—Online with alarms for remote failures
• Red—Active with a local alarm; router has detected a failure

Alarms, errors, and events

Alarms:

• Alarm indication signal—line (AIS-L)
• Alarm indication signal—path (AIS-P)
• Bit error rate—signal degrade (BERR-SD)
• Bit error rate—signal fail (BERR-SF)
• Frame error
• Idle code, Idle received
• Loss of frame (LOF)
• Loss of pointer (LOP-P)
• Loss of signal (LOS)
• Out of frame (OOF)
• Payload mismatch (PLM-P)
• Payload unequipped (unequipped STS at path level) (UNEQ-P)
• Parity bit (P-bit) disagreements
• Path parity error
• Remote defect indication—line (RDI-L)
• Remote defect indication—path (RDI-P)
• Yellow alarm bit (X-bit) disagreements

Error detection:

• Bit interleaved parity errors B1, B2, B3 (CV-S, CV-L, CV-P)
• Errored seconds (ES-S, ES-L, ES-P)
• Far-end bit errors, remote error indication—line (REI-L), far-end line coding violations (CV-LFE)
• Far-end bit errors, remote error indication—path (REI-P), far-end path coding violations (CV-PFE)
• Far-end errored seconds (ES-LFE, ES-PFE)
• Far-end severely errored seconds (SES-LFE, SES-PFE)
• Far-end unavailable seconds (UAS-LFE, UAS-PFE)
• Severely errored frames (SEF)
• Severely errored framing seconds (SEFS-S)
• Severely errored seconds (SES-S, SES-L, SES-P)
• Unavailable seconds (UAS-L, UAS-P)

Instrumentation (counters)

• Layer 2 per-queue and per-channel packet and byte counters