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ATM OC3 PIC (M40e Router)

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Software release

  • JUNOS 5.2 and later


  • Two OC3 ports
  • Power requirement: 0.49 A @ 48 V (23.7 W)
  • Conforms to ANSI T1.105-1991 and T1E1.2/93-020R1
  • ATM and SONET/SDH standards compliant
  • Alarm and event counting and detection
  • Compatible with well-known ATM switches
  • ATM switch ID, which displays the switch IP address and local interface name of the adjacent Fore ATM switches
  • Optical interface support—see ATM OC3 PIC Optical Interface Support (M40e Router)

Hardware features

  • Dual 3010 SAR for segmentation and reassembly into 53-byte ATM cells
  • High-performance parsing of SONET/SDH frames
  • OAM fault management processes alarm indication signal (AIS) and remote defect indicator (RDI) cells
  • ASIC-based packet segmentation and reassembly (SAR) management and output port queuing
  • 16-MB SDRAM memory for ATM SAR
  • Packet buffering, Layer 2 parsing

Software features

  • Multiprotocol Label Switching (MPLS) circuit cross-connect (CCC) for leveraging ATM access networks
  • Support for user-configurable virtual circuits (VC) and virtual paths (VP)
  • ATM Inverse Address Resolution Protocol (ARP), which enables routers to automatically learn the IP address of the router on the far end of an ATM permanent virtual circuit (PVC)
  • Unspecified bit rate (UBR) traffic shaping
  • Fine-grained variable bit rate (VBR) traffic shaping
  • Outbound PIC queues cells on a per-VC basis
  • Encapsulations—AAL5 subnetwork attachment point (SNAP)

Cables and connectors

  • Duplex SC/PC connector (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

Alarms, errors, and events

  • Alarm indication signal (AIS-L, AIS-P)
  • Bit error rate signal degrade (BERR-SD), bit error rate signal fail (BERR-SF)
  • Bit interleaved parity errors B1, B2, B3
  • Errored seconds (ES-S, ES-L, ES-P), far-end bit errors REI-L, REI-P (CV-LFE, 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)
  • Loss of cell delineation (LOC), loss of frame (LOF), loss of pointer (LOP-P), loss of signal (LOS)
  • Payload mismatch (PLM-P), payload unequipped (UNEQ-P)
  • Remote defect indication (RDI-L, RDI-P)
  • Severely errored framing (SEF), severely errored framing seconds (SEFS-S), severely errored seconds (SES-S, SES-L, SES-P), unavailable seconds (UAS-L, UAS-P)

Related Topics

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