Il Marconi OMS 1200 (Optical MultiService Metro‑Edge) is a high-performance SDH add/drop multiplexer engineered for metro-edge applications. Designed to support mixed TDM and packet traffic, it delivers Ethernet, PDH, and SDH services over a single, scalable platform, making it a cost-effective solution for networks transitioning from legacy to carrier-grade IP infrastructure.
With an efficient modular design, the OMS 1200 family includes compact (OMS 1240) and full-size (OMS 1260) sub-rack variants. Each system incorporates a non-blocking core switch—5 Gbit/s for STM‑1/4 systems and 10 Gbit/s for STM‑4/16 configurations—ensuring high-density service aggregation and deployment flexibility. The platform supports dynamic bandwidth cards, including multi-rate SDH tributary units and high-density Ethernet modules, enabling seamless service delivery in metro access, DSLAM aggregation, broadcast, mobile backhaul, and enterprise environments.
Built for reliability, the OMS 1200 offers robust protection features such as 1+1 line protection (MSP), ring switching (SNCP), and MS-SPRING for STM‑4/16 networks. Redundant core cards, power supplies, and hot-swappable modules help ensure carrier-class availability and simplify on-site maintenance.
Ideal for both legacy TDM and evolving packet-centric networks, the OMS 1200 facilitates smooth service migration through technologies such as GFP encapsulation and Ethernet over SDH. It supports a wide range of services—including broadband, IPTV, VoIP, VPN, and business connectivity—and can be managed through Ericsson’s ServiceOn Optical Element Manager or local terminal interfaces.
Multi-Service Support
Delivers SDH, PDH, and Ethernet services over a single, integrated platform—ideal for metro-edge and access networks.
Modular Design
Available in compact (OMS 1240) and full-size (OMS 1260) chassis with flexible slot configurations to meet various deployment needs.
High-Capacity Switching
Non-blocking switching core:
5 Gbit/s for STM-1/4 configurations
10 Gbit/s for STM-4/16 configurations
Ethernet over SDH (EoS)
Supports Ethernet transport using GFP, LCAS, and VCAT for efficient use of existing SDH infrastructure.
Protection & Resilience
Includes 1+1 MSP (Multiplex Section Protection), SNCP (Subnetwork Connection Protection), and MS-SPRING for ring topologies.
Hot-Swappable Modules
All cards and key components are hot-swappable, allowing live maintenance and upgrades with minimal service disruption.
High-Density Interfaces
Supports a wide range of interfaces including:
E1/T1
STM-1, STM-4, STM-16
Fast and Gigabit Ethernet
Serial and optical interfaces
Redundant Components
Optional redundant control units, power supplies, and cooling systems to ensure carrier-grade availability.
Comprehensive Network Management
Integrates with Ericsson’s ServiceOn Optical for remote configuration, monitoring, and fault management.
Service Flexibility
Ideal for mobile backhaul, business VPNs, DSLAM aggregation, broadcast transport, and legacy TDM service extension.
Platform Overview
The OMS 1200 is a compact, modular SDH add/drop multiplexer designed for metro-edge applications where mixed TDM and packet services are required. It facilitates smooth migration from legacy TDM services to carrier-grade packet infrastructures .
Chassis & Switching Options
Two sub-rack variants:
OMS 1240: Up to ~3.8 Gbps switching capacity
OMS 1260: Up to ~8.4 Gbps depending on configuration
Features fully non-blocking SDH line and VC‑level switch fabric supporting VC‑4/3/12 cross‑connects .
Service Support & Interfaces
TDM Support: Tributary units for E1/T1, 34/45 Mbps, 140 Mbps, STM‑1 and STM‑4 interfaces (configurable SFP modules) .
Ethernet Support:
Fast Ethernet and Gigabit Ethernet, including wirespeed GigE with flexible SFP modules
Supports MEF‑compliant services: E‑LINE, E‑LAN (EVPL, EVPLAN) .
Traffic & Switching Cards
Multi‑rate SDH tributary cards allow flexible mix of STM and PDH interfaces per card
FastE and GigE mapper units offering high port density with SFP modules .
Protection & Resilience
SDH protection mechanisms supported: MSP (Multiplex Section Protection), SNCP (Sub-Network Connection Protection), and MS‑SPRING for ring topologies
Traffic protection over line and tributary units, with fast failover enabled via LCAS and LLF .
Ethernet Traffic Handling
Ethernet features include VLAN tagging, Q‑in‑Q, RSTP/MSTP, frame policing/shaping, link aggregation, and Ethernet OAM (Y.1731, 802.1ag) .
Synchronization & Timing
Multiple timing sources supported: internal oscillator, SDH/PDH ports, or external clock inputs
Operates in Freerun or Single SETG timing mode with configurable priority tables and holdover capability .
Network Management & Standards
Managed via Marconi ServiceOn Optical and ServiceOn Access systems, with CLI and SNMP interfaces
Supports ITU‑T standards including G.703, G.704, G.707, G.783, G.784, G.841, G.842, GFP (G.7041), LCAS (G.7042) .
Environmental & Mechanical Data
Compact ETSI/19″ sub-rack, mountable horizontally or vertically
OMS 1240 dimensions approximately 445 mm (H) × 218 mm (W) × 280 mm (D) .
Redundant AC or DC power, hot‑swappable fans and line cards for carrier-class reliability.
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