The Alcatel 1641 SM is a compact, modular SDH Add-Drop Multiplexer (ADM) designed for efficient service delivery in access and metro transport networks. As part of Alcatel-Lucent’s trusted 1600 series, the 1641 SM enables service providers to aggregate, groom, and transport digital traffic with high reliability and flexibility.
Capable of supporting both STM-1 (155 Mbps) and STM-4 (622 Mbps) interfaces, the 1641 SM is ideal for network environments where scalability, space efficiency, and cost-effectiveness are critical. It offers a range of tributary interfaces—including E1, E3, and Ethernet—making it suitable for both traditional TDM services and emerging packet-based applications.
With its integrated cross-connect functionality, robust protection mechanisms, and full compliance with international SDH standards, the Alcatel 1641 SM ensures carrier-grade performance for a wide range of deployment scenarios. Whether used in point-to-point links or as part of a protected SDH ring, the 1641 SM delivers the flexibility, reliability, and manageability needed for modern transport networks.
The 1641 SM is designed for flexible deployment in space-constrained environments, with a modular architecture that simplifies installation and expansion.
Rack-mountable in ETSI or 19-inch configurations
Hot-swappable modules for easy maintenance and upgrades
Ideal for wall-mount or cabinet-based setups
Engineered to support core SDH standards, the 1641 SM enables high-speed optical transport in both access and metro networks.
Supports STM-1 (155 Mbps) and STM-4 (622 Mbps) interfaces
Compliant with ITU-T G.707, G.783, G.803, G.957 standards
Compatible with short-haul and long-haul optical modules
The system offers a range of interface options, making it suitable for mixed-service environments and legacy support.
Up to 63 E1 (2 Mbps) ports
E3 and DS3 support for high-capacity PDH traffic
10Base-T and 100Base-T Ethernet for basic data transport
A built-in non-blocking matrix enables efficient bandwidth utilization through granular traffic grooming.
VC-12, VC-3, and VC-4 level switching
Dynamic add/drop and full cross-connect capabilities
Enables service multiplexing and optimization
The 1641 SM can be deployed in various SDH architectures and supports multiple protection schemes for high availability.
Supports point-to-point, linear, and ring topologies
1+1 MSP (Multiplex Section Protection) and SNCP (Sub-Network Connection Protection)
Ensures carrier-grade reliability and service continuity
Operators benefit from powerful remote management and real-time monitoring capabilities.
Q3 interface for centralized supervision
Alarm reporting and performance monitoring built in
Compatible with Alcatel-Lucent’s OMS (Operations & Maintenance System)
Built for carrier-grade environments, the 1641 SM delivers dependable performance and long-term network stability.
Low power consumption with -48V DC operation
High MTBF with fault-tolerant design
Wide availability of replacement parts and support
The Alcatel 1641 SM is a compact and modular SDH Add-Drop Multiplexer (ADM) tailored for high-performance transmission in access and metropolitan networks. It is designed to deliver flexible bandwidth management, multi-service integration, and carrier-grade reliability in space-constrained environments.
SDH Line Interfaces:
Supports STM-1 (155 Mbps) and STM-4 (622 Mbps) optical interfaces
Conforms to ITU-T standards G.707, G.783, G.803, G.957
Compatible with single-mode fiber (short-haul and long-haul optics)
Switching and Cross-Connect:
Non-blocking digital switching matrix
Cross-connect capabilities at VC-12, VC-3, and VC-4 levels
Supports point-to-point, add/drop, and full grooming configurations
Tributary Interfaces:
E1 (2 Mbps) – up to 63 ports per shelf (config-dependent)
E3/DS3 – for higher-rate PDH services
10Base-T / 100Base-TX Ethernet – basic packet access
Line Interface Modules (LIMs):
STM-1 optical (short/long reach)
STM-4 optical (long reach)
Designed for use in a variety of topologies:
Point-to-point
Linear chains
Dual fiber ring (MS-SPRing)
Protection Mechanisms:
1+1 Multiplex Section Protection (MSP)
Sub-Network Connection Protection (SNCP) at VC-12/VC-4 levels
Ensures high availability and service continuity
Network Management:
Q3 interface for remote supervision
SNMP compatibility through external gateways
Fully supported by Alcatel-Lucent OMS (Operations & Maintenance System)
Alarm Handling:
LED indicators and dry contact alarms
Performance monitoring for all interfaces (BER, error events, etc.)
Power Input: -48V DC nominal
Power Consumption: < 100W per fully loaded system (config-dependent)
Operating Temperature: Typically 0°C to +45°C (standard telecom environment)
Form Factor:
Compact ETSI/19” rackmountable shelf
Suitable for wall-mount or cabinet installations
Hot-swappable cards and modules for minimal service interruption
Designed with high MTBF for long-term operation
Optional redundant power feeds and line modules
Backed by ongoing support from telecom asset management providers
The Alcatel 1641 SM is ideal for operators seeking to extend the life of their SDH networks, support legacy and emerging services, and deploy a reliable ADM platform in constrained environments. Its modularity, protocol compliance, and robust protection options make it a versatile component of any carrier-grade transport network.
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From expert maintenance and repair to reliable part sourcing and technical consultation, we provide comprehensive support for every stage of your network’s lifecycle. Whether you’re extending the life of legacy systems or integrating with modern infrastructure, our team ensures seamless, efficient, and cost-effective solutions—so you can focus on performance, not problems.