Alcatel Lucent VSEM-C Line Card for 7330 DSLAM

The Alcatel Lucent VSEM‑C (3FE62453 XA, also identified as VAUCAJZKAA) is a VDSL2 subscriber line card designed for the Alcatel‑Lucent 7330 DSLAM (Digital Subscriber Line Access Multiplexer). This card provides high‑speed broadband access over existing copper telephone lines, enabling service providers to deliver triple‑play services—high‑speed internet, VoIP, and IPTV—to residential and business subscribers.

Overview

The VSEM‑C line card is part of the 7330 DSLAM's modular line card family, supporting VDSL2 (Very‑high‑bit‑rate Digital Subscriber Line 2) technology. It incorporates advanced signal processing, vectoring (for crosstalk cancellation), and comprehensive diagnostics. The card interfaces with the subscriber loops through a high‑density connector panel, providing up to 48 ports per card. It is hot‑swappable and managed through the DSLAM's controller software.

Key Features

• VDSL2 support with profiles up to 35b (up to 300 Mbps aggregate)

• G.993.5 vectoring for crosstalk cancellation and improved line rates

• Up to 48 subscriber ports per card

• Integrated splitter for POTS/ISDN coexistence

• Built‑in diagnostic capabilities: SELT, DELT, and metallic testing

• Over‑voltage surge protection (6 kV/3 kA) per ITU‑T K.20

• Hot‑swappable for field replacement

• Management via DSLAM's OAM system (SNMP, TL1)

Technical Specifications

• Ports: 48x subscriber lines (via Telco 50‑pin connector)

• VDSL2 Profiles: 8a, 8b, 8c, 8d, 12a, 12b, 17a, 30a, 35b

• Line Rate: Up to 300 Mbps downstream / 100 Mbps upstream (profile dependent)

• Frequency Range: Up to 106 MHz

• Line Impedance: 100 Ω balanced

• Surge Protection: 6 kV/3 kA (8/20 µs)

• Diagnostic Features: SELT, DELT, metallic test (R, L, C measurements)

• Power Consumption: 40 W typical

• Operating Temperature: 0°C to 45°C

• Dimensions: Standard 7330 DSLAM line card format

Applications

The VSEM‑C card is deployed in central office and remote cabinet DSLAMs to provide VDSL2 broadband services. It is particularly suitable for fiber‑to‑the‑cabinet (FTTC) deployments where the DSLAM is located in a street cabinet within short distance of subscribers.

Integration and Management

The card integrates with the 7330 DSLAM's management system, supporting remote provisioning, performance monitoring, and fault diagnosis. It provides per‑port statistics including data rate, SNR, and error counts. Alarms are generated for loss of signal, excessive bit errors, or environmental warnings.

Installation and Maintenance

Installation involves inserting the card into an available slot in the 7330 chassis and connecting the subscriber cable harness. The system automatically detects the card and loads the appropriate firmware. Maintenance includes periodic line testing and monitoring environmental conditions.

Conclusion

The Alcatel Lucent VSEM‑C 3FE62453 XA line card is a robust, high‑performance solution for VDSL2 broadband access. Its advanced features, including vectoring and comprehensive diagnostics, enable service providers to deliver superior triple‑play services over copper infrastructure.