Cisco Line Cards

Cisco 12000 4-Port OC-3/STM-1 POS/SDH Line Card


Data Sheet

Cisco OC-3/STM-1 Packet-over-SONET/SDH Line Card for Cisco 12000 Series Routers

The Cisco OC-3/STM-1 Packet-over-SONET/SDH Line Card is a high-capacity, high-performance interface that is ideal for edge feature support and customer access applications. The four-port OC-3/STM-1 card may be ordered with multimode, single mode intermediate reach, and single mode long reach optics enabling customers to connect directly to fiber or traditional SONET/SDH solutions.

Figure 1   Cisco OC-3/STM-1 Packet-over-SONET/SDH Line Card

Table 1 Feature Highlights

Feature Description
Port Density

Four concatenated OC-3/STM-1 ports

Edge Support

CAR, EACL, MPLS, CoS, and NetFlow

Cisco IOS®

Rich Software feature set and advanced networking features


Multimode, single intermediate reach, and single mode long reach

Cost Per Bit

$53 per Mbps

Feature Summary

Packet Layer Support

  • Multiple virtual output queues, eliminating head-of-line blocking
  • 512-KB burst buffers, which smooth out the arriving packet bursts
  • 64 MB/64 MB packet buffer memory for Transmission Control Protocol (TCP) goodput
  • Configurable with up to 256 MB of code and route table memory
  • A Cisco Express Forwarding (CEF) table that can accommodate up to one million forwarding entries
  • Application-specific integrated circuit (ASIC)-based queuing
  • Class of service (CoS) support
  • IP-based congestion management


  • Standards compliant SONET/SDH interface
  • Alarm processing
    • Loss of Signal (LOS), Loss of Frame (LOF), Line Alarm Indicator Signal (LAIS), Path Alarm Indicator Signal (PAIS), Loss of Pointer (LOP), Line Remote Defect Indicator (LRDI), Path Remote Defect Indicator (PRDI), Signal Failure (SF), Signal Degrade (SD), Line Remote Error Indicator (Line FEBE), Path Remote Error Indicator (Path FEBE)
  • Performance monitoring
    • Error counts for B1, B2, B3
    • Threshold Crossing Alerts (TCA) for B1, B2, B3 with settable threshold
  • Synchronization
    • Local (internal) or loop timed (recovered from network)
    • 20 ppm clock accuracy
    • Pointer activity monitoring
  • Protection switching
    • Support both SONET APS and SDH MSP protocols
  • Local (Diagnostic) and line (Network) loopback
  • Payload mapping
    • IETF RFC 1619 Point-to-Point Protocol (PPP) over SONET/SDH
    • ATM 1 + X43 self synchronous scrambler

Software Features

  • Weighted Random Early Discard/Deficit Round Robin (WRED/DRR)
  • Committed Access Rate (CAR)
  • Access Control List (ACL)
  • Multicast forwarding
  • NetFlow
  • Multi Protocol Label Switching (MPLS)
  • MPLS traffic engineering using Routing with Resource Reservation (RRR)
  • MPLS VPN and CoS1



  • Occupies a single slot
  • Weight: 6 lb. (2.7 kg)
  • Height: 14 in. (35.6 cm)
  • Depth: 18 in. (45.7 cm)


  • Operating temperature: 32 to 104° F (0 to 40° C)
  • Storage temperature: -4 to 149° F (-20 to 65° C)
  • Relative humidity: 10 to 90%, noncondensing

Regulatory Compliance


  • Telcordia (Bellcore GR-253 as applicable)
  • ITU-T G.957 (as applicable)
  • ITU-T G.958 (as applicable)


  • UL 1950
  • CSA 22.2-No. 950
  • EN60950
  • EN41003
  • AUSTEL TS001
  • AS/NZS 3260
  • EN60825 laser safety (Class 1)


  • FCC Class A
  • AS 3548 Class A
  • EN55022 Class A
  • VCCI Class 1


  • IEC-1000-4-2 ESD
  • IEC-1000-4-3 radiated immunity
  • IEC-1000-4-4 EFT
  • IEC-1000-4-5 surge
  • IEC-1000-4-6 low Frequency common immunity
  • IEC-1000-4-11 voltage dips and sags
  • IEC-1000-3-2 power line harmonics


  • SR-3580—NEBS: Criteria levels (Level 3 compliant)
  • GR-63-Core—NEBS: Physical protection
  • GR-1089-Core—NEBS: EMC and safety


  • ETS-300386-2 switching equipment


  • Enable
  • Receive carrier
  • Receive packets
  • Alpha-numeric management display


  • SC duplex


  • IETF RFC 1661, PPP over SONET/SDH
  • IETF RFC 1662, PPP in HDLC like Framing
  • IETF RFC 1490, Frame-Relay encapsulation

Network Management

  • CiscoView
  • Simple Network Management Protocol (SNMP)
  • SONET MIB RFC 1595 supported through SNMP
  • Management Information Base (MIB)-II
  • IP Manager

System-Level Requirements

  • A miniumum of one clock scheduler card (CSC) is required for OC-3/STM1 deployment
  • Release 11.2 (11 GS2 or higher)
  • Release 12.0 (2 S or higher)

Table 2 Optical Power Budget Packet over SONET/SDH Cisco 12000 OC-3/STM-1 Optics

Parameter Multimode Fiber 1261-1360 nm Intermediate Reach 1261-1360 nm IR-1 Long Reach 1280-1335 nm LR-1
Line Rate

155.52 Mbps

Connector Type


Launch Power (Max.)

-14 dBm

-8 dBm

0 dBm

Launch Power (Min.)


-15 dBm

-5 dBm

Receiver Power (Max)

-14 dBm

-8 dBm

-8 dBm

Receiver Power (Min.)

-30 dBm

-31 dBm

-34 dBm

Optical Path Power Penalty

1 dB

1 dB

1 dB

Power Budget

11.5 dB

16 dB

29 dB

Maximum Distance1

2 km

15 km

40 km

1Worst-case scenario considering fiber, connectors, patch panel, and splices.

Note: a typical single-mode optical cable has a transmission loss of 0.4-0.5 dB/km at the 1310 nm region. The splicing loss will be 0.2-0.3 dB each, and splicing will be made at every one to three kilometers (conduit) or two to five kilometers (direct burial).

Table 3 Product Availability and Part Numbers

Product Descriptions Part Number Availability
Four Port OC-3/STM-1 SONET/SDH Multimode LC with SC Connector



Four Port OC-3/STM-1 SONET/SDH Single-Mode IR LC with SC Connector



Four Port OC-3/STM-1 SONET/SDH Long Reach LC with SC Connector



Route Table Memory Packet Buffer Memory
Product Number Description Product Number Description


64-MB GRP and LC Program/Route Memory (1x64-MB)



128-MB GRP and LC Program/Route Memory (1x128-MB)


Line Card Buffer Memory, 64-MB/64-MB (Tx/Rx)


256-MB GRP and LC Program/Route Memory (2x128-MB)


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1Post initial FCS release