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ATM OC3 PIC

Image g003054.gif

Software release
  • JUNOS 3.1 and later
Description
  • Two OC3 ports
  • Power requirements: 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 Table 2
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)
LEDs 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 (CV-S, CV-L, CV-P)
  • 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)

Table 2: Optical Interface Support for ATM OC3 PICs

PIC Type Single-mode Intermediate Reach Multimode
Optical interface Single-mode, intermediate reach (Bellcore GR-253 compliant) with SC/PC duplex connector (maximum distance 9.3 miles/15 km) Multimode with SC/PC duplex connector (maximum distance 1.2 miles/2 km), ATM Forum af-phy-0046
Wavelength 1260 through 1360 nm 1270 through 1380 nm
Average launch power –15 through –8 dBm –20 through –14 dBm
Receiver saturation –8 dBm –14 dBm
Receiver sensitivity –28 dBm –30 dBm

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