The Marconi MSH‑11C is a robust, compact multiservice SDH access node developed to deliver reliable and efficient transport of voice and data services across traditional telecommunications networks. It was engineered to meet the evolving needs of network operators in the early 2000s, providing a flexible and modular platform for deploying Synchronous Digital Hierarchy (SDH) at the edge of the network. Designed for deployment in space-constrained environments, the MSH‑11C supports multiple interface types and service configurations, making it ideal for last-mile connectivity, enterprise leased-line delivery, and mobile backhaul in legacy infrastructures.
A key feature of the MSH‑11C is its ability to aggregate multiple E1 interfaces over higher-capacity STM‑1 or STM‑4 optical trunks, enabling efficient grooming and transport of digital traffic. It also includes built-in cross-connect and protection capabilities, allowing traffic to be switched or rerouted in the event of a fault, contributing to high service reliability.
Today, the Marconi MSH‑11C remains in operation across many global telecom networks where SDH infrastructure still plays a vital role. Carritech supports network operators by sourcing and supplying MSH‑11C hardware and spare parts through our network of trusted partners. We ensure every unit is rigorously tested and compatible with existing infrastructure, helping customers extend the operational life of their SDH networks while planning for future transitions.
Compact Design: Space-efficient chassis suitable for installation in small exchanges, base station sites, or remote locations where rack space is limited.
Multiservice Capability: Supports both STM‑1 and STM‑4 transport interfaces along with a range of E1 tributary ports, making it suitable for voice, data, and legacy traffic.
Flexible Configuration: Modular slots support a variety of interface and service cards, allowing operators to tailor the node to specific deployment requirements.
SDH Cross-Connect: Offers VC‑12 and VC‑4 level switching, enabling aggregation and grooming of multiple services for efficient network utilization.
Built-in Protection Schemes: Supports various SDH protection mechanisms such as SNCP (Sub Network Connection Protection) and MSP (Multiplex Section Protection), ensuring service continuity during failures.
Carrier-Grade Reliability: Proven high availability in live networks, with low power consumption and excellent thermal performance.
Network Management Integration: Fully manageable via local and remote interfaces, compatible with standard network management protocols and Marconi’s own NMS platforms.
Versatile Applications: Deployed for metro access, last-mile delivery, business connectivity, and as a reliable node for connecting legacy PBXs and PDH systems to core networks.
Chassis and Form Factor:
Typically rack-mountable, occupying 2U to 3U of vertical rack space
Compact depth suitable for shallow enclosures
Dimensions (approx.):
Width: 440 mm
Height: 88–130 mm (varies by configuration)
Depth: 240 mm
Transmission Interfaces:
2 × STM‑1 (optical or electrical options)
1 × STM‑4 (optical)
Tributary Interfaces:
Configurable E1 capacity, typically up to 63 E1 ports depending on installed modules
TDM and PDH compatibility for integration with legacy infrastructure
Cross-Connect Capabilities:
Full non-blocking cross-connect for VC‑12 and VC‑4
Supports grooming, multiplexing, and protection switching
Power Supply:
Input: -48 VDC
Optional redundant power supply modules for failover protection
Cooling:
Fan-based system with front-to-back or side airflow depending on installation
Operating Environment:
Temperature range: 0°C to +45°C (standard), extended temperature versions may exist for harsh environments
Humidity: Up to 95% non-condensing
Management and Control:
Local interface for on-site configuration
Remote management via standard protocols (e.g., SNMP, TL1)
Compatible with Marconi’s legacy network management systems
Compliance and Standards:
Conforms to relevant ITU-T SDH standards and regional telecom regulations
Built to ETSI and Telcordia physical and electrical specifications
| Time Period | Brand / Company | Role / Notes |
|---|---|---|
| Early 2000s – 2006 | Marconi Communications / Marconi Corporation plc | Original developer and marketer of the MSH‑11C, focused on global telecom carriers needing compact SDH access solutions. |
| 2006 – Present | Ericsson (legacy support only) | Following Ericsson’s acquisition of Marconi’s telecommunications business, the MSH‑11C was maintained for a limited time under long-term support contracts but was eventually phased out of active promotion and sales. |
| Present (Secondary Market) | Independent Resellers & Support Specialists (e.g., Carritech) | Carritech sources and supplies Marconi MSH‑11C units and spare parts to help extend the life of legacy SDH networks, offering full testing, logistics support, and technical guidance. |
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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.