Synchronous Digital Hierarchy (SDH)
critical communications infrastructure
SDH provides a reliable and scalable transport backbone for critical communication networks. Designed for high availability and precise synchronization, SDH is ideal for utility, transportation and infrastructure environments where uninterrupted data flow is essential.
DNWP’s Connection Master platform offers robust STM-1/4/16 connectivity and integrates seamlessly with modern Ethernet services via Ethernet over SDH. Connection Master SDH platform is ready for MPLS-TP just adding one new plug-in module.
SDH remains a future-ready choice for organizations requiring long-term performance, network stability and timing accuracy.
With built-in support for deterministic transport and carrier-grade resilience, SDH continues to complement packet-based technologies such as MPLS-TP.
DNWP SDH technologies’ key features
STM-1/4/16 SDH trunk
Industry-standard synchronous transmission rates for reliable backbone connectivity.
PDH interfaces
Complete selection of PDH tributary interfaces to support legacy services.
Ethernet over SDH
Enables seamless transport of Ethernet traffic over resilient SDH infrastructure.
TDM cross-connection matrix
Flexible cross-connection down to individual time slots for precise service mapping.
Long life cycle
Evolving platform with regular software updates. Hardware and software ready system for evolution path towards MPLS-TP networks.
Why SDH Still Matters for Teleprotection
1. Ultimate class of service. Time division multiplexing provides dedicated slots for each service. Why it matters: there are zero resource sharing. Even if the other service is flooded with traffic, a critical teleprotection signal in an SDH network will never experience a delay or a dropped packet.
2. Jitter free transmission with fixed latency. In SDH networks all actions are synchronized to the same clock domain . Why it matters: teleprotection relays, especially differential protection, compare the phase of electricity at two ends of a line. This requires the constant communication delay and delay must also be identical in both directions.
3. Physical layer security. SDH networks are layer 1 without header addresses. Why it matters: in SDH there are not commonly known attack vectors and no possibility to re-route traffic by hackers.
Common Benefits in SDH-Compatible Systems
These features are typically found in platforms supporting SDH, enhancing performance, reliability, and integration:
- High availability configurations with redundant control and power modules
- Optimized for mission-critical, low latency, and time-sensitive applications
- Full interoperability with legacy platforms like Dynanet and FMX2
- Intuitive graphical user interfaces for simplified operation
- End-to-end service provisioning via advanced network management systems
- Modular chassis options
- 6-slot subrack
- 16-slot subrack
- STM-1/4/16
- Ethernet over SDH
- MPLS-TP
- Wide range of data interfaces:
- E1
- V.24
- V.24,V.11, X.21
- G.703/64k
- C37.94
- Voice interface support
- E&M
- FXS
- FXO
- External alarm input
