STM-4 (upto 252 E1)

Introduction

The VCL100 STM-1/4 is a modular, and cost effective STM-1/4 SDH multiplexer equipment designed to manage bandwidth and voice & data access services over STM networks. The products are designed to support end-to-end provisioning and management of services across all segments of the optical network. It combines innovative optical networking software with the intelligence of SONET/SDH to deliver a flexible, cost-effective network solution.

The VCL100 STM-1/4 provides flexibility to the customers in terms of expansion to support additional client interfaces by adding new modules in the field. It is also a scalable system that enables the customer to start with an STM-1 network and upgrade to STM-4 as the traffic demand increases.

The distinguishing features of VCL100 STM-1/4 over competing products are its unprecedented port density, scalability, redundancy and upgrade-ability with its software intelligence. The VCL100 STM-1/4 family of products can be managed through an integrated NMS that manages all STM equipment, providing customers with end-to-end provisioning from a single platform for multiple service types – from E1s, E3s, STM-1, STM-4, and 10/100Mbps Ethernet services.

Features

Next generation access SDH multiplexers to provide multi-service solutions at the edge.
Supports for both TDM and data traffic services.
Flexible set of configurations to meet customer’s different service requirements.
Bring the power of Intelligent Optical Networking from optical core to access.
STM-1 STM-4 and STM-4 Muxes comes with:

Add/Drop and Terminal Multiplexer, Cross-Connect and Regenerator configurations
E1, E3, E4, STM-1e (electrical), STM-1 (optical) and 10/100 Mbps ethernet tributaries
Built-in cross-connect capabilities at VC-12, VC-3 and VC-4 granularity
Support for AU-3 and AU-4 mapping
Rate adaptive ethernet services for easy control of bandwidth with 2 Mbps granularity.

Supports MSP and SNCP protection.
“Point-and-click provisioning“ of E1s, E3s, STM-1 and 10/100 Ethernet Interfaces for ease of management.
Optional hardware redundancy for power supply, processor sub-system and aggregate interfaces (STM-1/STM-4).

Redundancy and Protection

Carrier Class Redundancy

Optional redundant power supply card, operating as hot-standby and non-traffic affecting
Optional redundant processor sub-system, operating as hot-standby and non-traffic affecting
Optional redundant cross-connect card, with on-board cross-connect configurationstorage
Optional redundant aggregate card, with automatic switchover from failed card to standby card.
Hot insertion of cards supported, with automatic synchronization of timing, data and provisioning information between redundant cards.
Software redundancy for terminating and restarting critical processes with no service disruption.

Protection mechanisms

1+1 Line Protection Switching (MSP as per G.783 )
VC-12 and VC-3 Path Protection Switching (LO/HO SNC as per G.841 §8)
Diverse Mesh protection (through PNCP module)

Ethernet Support on VCL100 STM-1/4

This section details the support for transport of Ethernet on SDH as offered on VCL100 STM-1/4 and discusses some of its salient features.

Some of the salient features of the Ethernet transport support on VCL100 STM-1/4 are:

Physical Interfaces – The Ethernet tributary card (ETC) supports 10/100 BaseT physical interfaces. The interfaces support auto-sensing and auto-negotiation to detect flow control and line rate capabilities.

Bandwidth granularity – VCL100 STM-1/4 provides the flexibility to provide granularities from say 2 Mbps all the way to maximum limit of the physical interface, for instance 10 Mbps or 100 Mbps. The exact user demand is software provisionable in increments of 2 Mbps. This feature provides the service provider numerous price points, and on the other hand it benefits service provider’ s customers by allowing them to “ pay as you need” without a change in hardware.

SLA - Subscribers connected to a service provider via VCL100 STM-1/4 would be able to obtain Guaranteed Bit Rates (GBR) and Maximum Burst Rates (MBR) that provide specific bandwidth guarantees instead of a "best efforts" service. The SLA parameters would be software provisionable and could be changed by the network operator based on individual SLAs.

Enhanced Reliability – Since Ethernet is transported over SDH, robust SDH protection mechanisms ensure high reliability.

Transparent LAN Services (TLS) – VCL100 STM-1/4 with the Ethernet tributary card allows geographically separated LAN or VLANs to be interconnected.

ETC is a source of increased revenue for the service provider, and at the same time reduces the cost of connection per customer.

Related Links

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