SONET/ SDH

Deterministic Realtime Optical Transport
Synchronous Optical Network (SONET), developed in the US by the ANSI and Synchronous Digital Hierarchy (SDH), developed in the Europe by the ITU-T are two almost identical standards for transmitting various data payloads over optical fibers at high speeds.
Here, the entire network is time-synchronized tightly, which is a significant difference from the previous Plesiochronous Digital Hierarchy (PDH) standard. This synchronization significantly reduces buffering in the transmission and thus improves the data rate. The data rates for SONET/ SDH vary from 155 Mbps for OC-3/ STM-1 to 40 Gbps for OC-768/ STM-256. SONET/ SDH has well-defined frame structure and uses TDM as the underlying mechanism for multiplexing services. SONET/ SDH is still widely used across the world. Even where the core network is getting transformed into a packet core, there are a significant number of client interfaces continuing to use SONET/ SDH. Changing client services is an expensive and time-consuming affair. Circuit Emulation of SONET/ SDH is an effective strategy for network backbone modernization without impacting the client service.
For long, Tejas has been a leading provider of SONET/ SDH solutions. Tejas Circuit Emulation Service (CES) cards have one of the most advanced implementations of the circuit emulation function in the industry today. As a result, with Tejas multi-purpose platforms, service providers can support SONET/ SDH in addition to multiple technologies such as PTN, OTN, DWDM on the same platforms.

Tejas Offerings – Key Highlights

Wide Range Coverage – E1/ DS1, E3/ DS3, STM-1/4/16/64, OC – 3/12/48/192

Multiple Technology Support – SONET/ SDH – Circuit Emulation, PTN, OTN, DWDM on the Same Platform

One of the Densest Circuit Emulation Implementations

Unified Single-window Network Management

Cost-effective and Phased Network Modernization

Solutions Deployed Across the World

Products and Resources

Metro Core and Backbone

Tejas Metro Core and Backbone Portfolio

Circuit Emulation Service

Optical Aggregation

Tejas Optical Aggregation Portfolio

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