Il Alcatel 1641 DS is a compact, high-performance SDH (Synchronous Digital Hierarchy) Add-Drop Multiplexer designed to meet the growing demands of modern transmission networks. Part of the trusted Alcatel-Lucent 1600 Series, the 1641 DS delivers robust and flexible transport capabilities, making it ideal for metropolitan and regional networks where efficient bandwidth management and service scalability are essential.
Engineered to support STM-1 and STM-4 transmission rates, the 1641 DS enables the seamless aggregation, grooming, and delivery of digital signals with carrier-grade reliability. Its modular design allows for a variety of tributary interfaces, including E1, E3, DS3, and Ethernet, ensuring compatibility with both legacy systems and emerging IP-based services.
With features such as integrated cross-connect functionality, advanced alarm monitoring, and network management support via Q3 and SNMP protocols, the Alcatel 1641 DS offers a future-ready solution for operators seeking to optimize transport efficiency while maintaining service quality.
The Alcatel 1641 DS is designed to support a wide range of transmission requirements in SDH-based networks. It accommodates both lower and higher-order SDH signals, making it suitable for access and metropolitan network layers.
Supports STM-1 (155 Mbps) and STM-4 (622 Mbps) line interfaces
Fully compliant with ITU-T standards including G.707, G.783, G.803, and G.957
Offers both optical and electrical transmission interfaces for versatile deployment
The system supports a variety of tributary interfaces, enabling seamless integration with legacy and modern network elements.
E1 (2 Mbps) tributary interfaces for traditional PDH services
E3 and DS3 interfaces for higher-capacity PDH connections
10Base-T and 100Base-T Ethernet interfaces for basic packet-based services
STM-1 optical/electrical interfaces and STM-4 optical interfaces
Efficient bandwidth management is achieved through a fully non-blocking cross-connect matrix that allows for fine-grained grooming at multiple virtual container levels.
VC-12, VC-3, and VC-4 granularity switching
Dynamic add/drop and pass-through capabilities for flexible traffic routing
Enables service multiplexing and grooming at both low and high speeds
The 1641 DS can be deployed in various topologies, offering service providers flexibility in building and maintaining their transport networks.
Compatible with point-to-point, ring, star, and mesh network architectures
Supports 1+1 Multiplex Section Protection (MSP) for optical line redundancy
Offers sub-network connection protection to enhance service continuity
Integrated management and monitoring features ensure reliable operation and simplify network administration.
Remote network management through the Q3 interface
Compatible with Alcatel-Lucent’s Operations and Maintenance System (OMS)
Full support for alarm monitoring, performance metrics, and fault diagnostics
Built for space-constrained environments, the Alcatel 1641 DS combines a small footprint with modularity and serviceability.
Rack-mountable chassis available in 19-inch and ETSI formats
Hot-swappable modules allow for live maintenance and upgrades
Operates on -48V DC power with low power consumption
Designed for continuous operation in carrier-class environments, the system offers high availability and minimal service disruption.
Built-in hardware redundancy options
Long mean time between failures (MTBF)
Supported by a wide network of suppliers and spare parts availability
Interface Support:
Tributary interfaces: E1, E3, DS3, 10BaseT/100BaseT Ethernet
Line interfaces: STM-1 (electrical/optical), STM-4 (optical)
Supports both short-haul and long-haul optical modules, including SFP-based configurations for flexible deployment
Switching Matrix:
Integrated VC-12/VC-3/VC-4 granularity cross-connect with full grooming capability
Matrix capacity of up to 64×64 VC-4s or equivalent lower-order units
Network Topology Compatibility:
Suitable for point-to-point, ring, and star topologies
Fully compliant with ITU-T G.707, G.783, G.803, and G.957 standards
Management and Alarms:
Supports Q3 interface for centralized network management
Integrated alarm and performance monitoring, with LED indicators and dry contact relays
Compatible with Alcatel-Lucent’s OMS (Operations and Maintenance System)
Redundancy and Reliability:
1+1 MSP (Multiplex Section Protection) for optical line protection
Hot-swappable modules for minimal service interruption
Designed for carrier-grade operation with high MTBF and low power consumption
Form Factor and Power:
Compact 19” or ETSI rackmount chassis
Typically powered via -48V DC with low energy footprint
| Period | Owner / Marketer | Notes |
|---|---|---|
| Early 2000s–2006 | Alcatel | Initial development and launch of the Alcatel 1641 DS compact SDH Add‑Drop Multiplexer within the 1600 series. |
| 2006–2016 | Alcatel‑Lucent | Continued product promotion and support under Alcatel‑Lucent following the merger. |
| 2016–Present | Nokia | Legacy product maintained by Nokia after acquiring Alcatel‑Lucent, with documentation and support carried forward. |
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