The Marconi SMA‑16 3.3 is a high-performance SDH (Synchronous Digital Hierarchy) aggregation and transport node developed to support large-scale service delivery across STM‑1, STM‑4, and STM‑16 optical interfaces. As one of the most advanced platforms within the SMA family, the SMA‑16 3.3 is designed for deployment at metro core, regional hub, or large enterprise network locations that require a high density of tributary and trunk interfaces combined with robust switching and protection mechanisms.
Engineered for scalability, the SMA‑16 3.3 features a modular chassis with flexible configuration options, allowing operators to combine traditional PDH (E1/T1) service delivery with more modern Ethernet over SDH transport. Its cross-connect architecture provides full VC‑12 and VC‑4 grooming capabilities, while its built-in redundancy features help ensure uninterrupted network service in critical environments.
This platform is ideal for service providers seeking to maintain high-capacity synchronous networks or support legacy infrastructure where deterministic transmission and low latency are essential. The SMA‑16 3.3 remains a viable and stable solution in existing SDH networks, especially when integrated with hybrid systems bridging packet and synchronous domains. Carritech supports the ongoing operation of SMA‑16 3.3 systems by sourcing spare parts, tested modules, and offering hardware lifecycle extension services.
High-Capacity Transport Support: Supports STM‑1 (155 Mbps), STM‑4 (622 Mbps), and STM‑16 (2.5 Gbps) optical transmission, providing flexible scalability across multiple SDH layers.
Advanced Cross-Connect Matrix: Non-blocking switching of VC‑12 and VC‑4 containers for efficient grooming, service distribution, and bandwidth management.
Modular Design for Multi-Service Delivery: Supports a variety of interface cards, including E1, T1, Fast Ethernet (10/100 Mbps), and asynchronous traffic modules, allowing for a broad service mix.
Redundant Architecture: Built with carrier-grade availability in mind, featuring dual power feeds, controller card redundancy, and protected switching fabrics to ensure uninterrupted performance.
Ethernet over SDH Capability: Supports GFP (Generic Framing Procedure), LCAS (Link Capacity Adjustment Scheme), and virtual concatenation (VCG), enabling packet service delivery over traditional SDH infrastructure.
Flexible Shelf Configuration: Modular shelf architecture allows operators to tailor the unit for specific deployment requirements while preserving upgrade potential.
Integrated Network Management: Full remote and local management capabilities, with compatibility to Marconi’s SDH OMS platforms, supporting TL1 and SNMP protocols for centralized control.
Optimized for Legacy and Hybrid Networks: Ideal for networks where legacy services still require support alongside newer Ethernet-based transport methods, enabling smooth network transitions without service disruption.
Chassis & Form Factor:
Rack-mountable modular shelf, typically 9U in height
ETSI and 19-inch rack compatible
Front-facing access to all modules and components
Transmission Interfaces:
Multiple STM‑1, STM‑4, and STM‑16 optical ports
Support for both short- and long-reach optical interfaces
Compatible with 1310 nm and 1550 nm wavelengths depending on module installed
Tributary Interfaces:
E1 (2 Mbps) or T1 interfaces via high-density plug-in modules
Fast Ethernet (10/100 Mbps) ports with encapsulation over SDH
GFP/LCAS/VCG supported for Ethernet mapping
Cross-Connect Capability:
Non-blocking VC‑12 and VC‑4 matrix
Switching capacity sufficient for large regional aggregation sites
Protection & Redundancy:
Dual power supply inputs (-48 VDC)
Hot-swappable controller, matrix, and interface cards
SNCP, MSP, and other SDH protection schemes supported
Cooling System:
Fan-based system with monitored airflow
Replaceable fan trays for field maintenance
Environmental Conditions:
Operating temperature: 0°C to +45°C
Humidity: 5% to 95%, non-condensing
Designed for use in central offices, switch rooms, or indoor telecom enclosures
Power Consumption:
Typically 100–200W depending on configuration and number of active modules
Optimized for continuous, low-interruption operation
Management Interfaces:
Local craft terminal
Ethernet port for remote management
Supports SNMP and TL1 for integration with existing NMS platforms
Standards & Compliance:
Fully compliant with ITU-T G.707, G.783, G.803, G.841
CE, ETSI, and Telcordia certified
Meets safety, EMC, and telecom-grade operating standards
| Time Period | Brand / Company | Role / Notes |
|---|---|---|
| Early 2000s – 2006 | Marconi Communications / Marconi Corporation plc | The SMA‑16 3.3 was introduced as a next-generation SDH access and aggregation multiplexer designed for high-capacity metro and regional deployments. |
| 2006 – Present | Ericsson (legacy support only) | Following Ericsson’s acquisition of Marconi’s telecom division, the SMA‑16 3.3 continued to be supported in legacy networks under long-term service agreements, though no longer actively promoted. |
| Present (Secondary Market) | Independent Resellers & Support Specialists (e.g., Carritech) | Carritech sources SMA‑16 3.3 units and spare parts from global partners, thoroughly tests them for compatibility, and supports legacy operators with technical assistance and lifecycle planning. |
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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.