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ATM OC3 EOL PIC (T320 Router)


Software release

  • Junos OS Release 4.0 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

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


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

  • 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)