Alcatel‑Lucent LNW46 DMX Metro OC12 Interface Circuit Module – 108694878

The Alcatel‑Lucent LNW46 is a high‑density interface circuit module designed for the DMX (Digital Multiplexer) Metro platform, providing OC‑12 (622 Mbps) or STM‑4 optical connectivity. Identified by part number 108694878 and hardware code SOIFFR0, this line card is used in metropolitan aggregation networks to interconnect central offices, data centres, and access nodes over fibre optic rings.

The module supports both SONET (OC‑12) and SDH (STM‑4) framing, with automatic detection and configuration. It features dual optical interfaces (S‑1.1, L‑1.1, or I‑1) for transmit and receive, enabling 1+1 or 1:N protection switching. The card includes a full set of performance monitoring (PM) parameters as defined by Telcordia GR‑253 and ITU‑T G.784, including errored seconds, severely errored seconds, and unavailable seconds.

Integrated overhead processing allows extraction and insertion of section/line/path overhead bytes for network management and maintenance. The module also supports automatic protection switching (APS) protocols (1+1 bidirectional and 1:N unidirectional). It is hot‑swappable and fully managed via the DMX craft interface or TL1.

Technical Specifications

• Product Type: SONET/SDH Interface Module

• Model: LNW46 DMX Metro OC12

• Part Number: 108694878 / SOIFFR0

• Data Rate: 622.08 Mbps (OC‑12) / 622.08 Mbps (STM‑4)

• Optical Interfaces: 2 x SC/PC (dual‑fiber) or 1 x single‑fiber (variant dependent)

• Wavelength: 1310 nm (S‑1.1) or 1550 nm (L‑1.1)

• Reach: Up to 15 km (S‑1.1), up to 40 km (L‑1.1)

• Framing: SONET (OC‑12) or SDH (STM‑4) – auto‑detect

• Overhead Processing: Section, Line, and Path

• Protection: 1+1 APS (bi‑direction), 1:N (unidirectional)

• Performance Monitoring: per ITU‑T G.784 / GR‑253

• Diagnostics: Loopback (line, payload, terminal)

• Power Supply: –48 VDC from backplane

• Power Consumption: 25 W typical

• Operating Temperature: 0°C to 50°C

• Dimensions: Standard DMX slot (custom form factor)

• Compliance: Telcordia GR‑253, ITU‑T G.783, RoHS

Key Features

• Dual optical interfaces for redundant or diverse routing.

• Full APS support for network resilience.

• Comprehensive PM and alarm reporting.

• Automatic framing and rate detection.

• Hot‑swappable for maintenance without service interruption.

Deployment Scenarios

Used in metro core and edge rings to aggregate OC‑3/STM‑1 signals or to interconnect with legacy TDM equipment. Also deployed in campus backbones for high‑capacity fibre links between buildings.

Management

Managed via DMX’s local craft terminal or SNMP via gateway. Supports command line and TL1 interfaces.

Reliability

MTBF > 150,000 hours; redundant optical ports and power inputs.

Conclusion

The Alcatel‑Lucent LNW46 DMX Metro OC12 interface module offers a reliable, feature‑rich solution for SONET/SDH transport in metro networks, combining high‑density optics, APS, and comprehensive management.