Solutions Overview

In recent years, carriers and service providers have paid considerable attention to upgrading their networks to accommodate the explosive growth in data traffic.

E1 access currently dominates in small and medium enterprise (SME) networks, but with more and more buildings being connected with fiber, leased line E3/T3 and STM-1 services are quickly overtaking demand for E1 lines. Mobile networks are also a major driving force in the current demand for E1 leased lines.

Much of the drive for higher bandwidth comes from the Internet, corporate LAN-to-LAN traffic, storage networking and mobile multimedia services. For that job, Ethernet connectivity is the preferred solution, with full rate and fractional 10/100BASE-T and Gigabit Ethernet services gaining increasing popularity. Nevertheless, there will be continuing demand for legacy PDH services, and coexistence with new high-speed data services in a space–constrained environment will dictate the requirements for the new access network.

Current approaches are clearly way too expensive and complex for quick and profitable deployment of TDM and packet data services. Installing large and expensive SDH systems on customer premises is out of the question. Complex router-based networks are also expensive and difficult to manage. A new solution is clearly needed to make a managed transition from pure TDM to pure data networks. This solution must address the key issues of cost, size and flexibility – all providing the underlying capabilities for an immediate return-on-investment for the service provider.

The Profitable Solution

The OnSite S10/15 is the first product family in its class that provides the flexibility and superior price-performance required to deliver TDM and packet data services in highly competitive environments. All platforms in the S10/15-series feature an ultra-compact 1RU design that connects to existing SDH networks using standard STM-1 and STM-4 interfaces in terminal, linear or ADM modes. The S10/15 is built on the following standard technologies:

• SDH transport
• Virtual concatenation (VCAT), GFP and LCAS
• L2 Packet Intelligence (VLAN, MPLS, QoS)

You can use any of the S10/15-series platforms as customer-located equipment in buildings with direct fiber access to the SDH network or to a service provider POP (point-of-presence). The system can collect and connect E1 traffic from equipment such as PBX, routers using E1 WAN interfaces, digital loop carriers and legacy primary-rate multiplexers. Another important application is the transport and consolidation of E1 traffic from remote BTS or Node B sites to a centralized BSC or RNC in 2G and 3G mobile networks.

The Ethernet interfaces on the S10/15-series are ideal for applications that require high-speed interconnection of routers, switches, IP DSLAM, CMTS, wireless access points (WiFi and WiMAX) or storage equipment over reliable SDH links. Using the VCAT feature, you can assign transport capacity for Ethernet services over SDH in accordance to end-user needs. This assignment can be done in flexible incremental steps of 2 or 50 Mbit/s up to full line rate.

The OnSite S10/15 combines these functions in one small, yet powerful platform that enables meeting current and future demand for PDH leased line services and positions your network for the new wave of data services – without compromising existing revenues from legacy TDM.

Benefits Seamless transition from TDM to packet data Compatibility with existing SDH network Modular service and capacity upgrades Simple management and operation Reduced CAPEX and OPEX Simplified network planning Full-rate and fractional Ethernet services

Applications Building Access (business or residential) 2G/3G mobile BTS/Node B cell site backhaul Basic telephony and leased line services Public wireless access point backhaul SDH digital microwave radio Cable Headend CMTS backhaul Backup storage and disaster recovery Carrier Hotel distribution