30 June 2003 Munich, Cannes Lightwave Europe--Siemens ICN will report on strategies to enhance metro networks with Ethernet functionality at this week's (1-4 July) WDM & Metro Optical conference in Cannes, France.
Cost-conscious network operators are in a bind, says Siemens. "They have invested millions in SDH equipment, but to meet current and future demands, they need to move beyond the capabilities of existing networks. Yet they don't want to replace their existing SDH network - and now they don't have to. Enhancing it is the most economical approach."
Siemens will argue that SDH is the dominant transport protocol in longhaul networks (voice and data) as well as in voice-dominated metro networks. As a resilient, well-understood transport mechanism, SDH has stood the test of time.
It offers carrier-class reliability - 99.999% availability based on 50-msec switching to backup paths, combined with extensive performance monitoring. SDH also provides transport for different traffic types, whether voice connection, ATM, or IP, supported by the latest quality-of-service capabilities for each protocol.
But current SDH networks have shortcomings. Traditional SDH was designed to carry voice traffic, and as such is a rigid and inefficient method for transporting data. It offers relatively coarse granularity derived from the old voice networks - 2 Mbit/s, 34 Mbit/s, 165 Mbit/s, and so on. Full bandwidth is required to handle bursts of data traffic, even if connections are usually free of traffic. The unused bandwidth provides no benefit.
Now carriers have a new option: next-generation SDH - transforming a rigid, voice-oriented network to a universal transport mechanism that is optimized for voice and data. As the foundation for all types of network traffic, this new SDH offers the flexibility and efficiency of optical Ethernet, while providing the management features and high availability essential for carrier class transport.
What is perhaps most attractive for network operators, the equipment is installed in the access and metro area of the network, allowing carriers to enhance the capabilities of their current SDH network for a relatively modest investment.
The presentation will be held on 3 July at 2:00pm in the Noga Hilton in Cannes, France.
Siemens Information and Communication Networks (IC Networks) is a leading provider of network technology for enterprises, carriers and service providers. Its comprehensive portfolio - HiPath for enterprises, SURPASS for carriers - comprises IP-based convergence solutions for voice and data, a full range of solutions for broadband access, and optical transport networks.
The Siemens Group provides complete solutions from a single source for the infrastructure of the Next Generation Network - optimised for a prompt return on investment and to open up new business opportunities for customers.
(In fiscal 2002 (year-end 30 September) IC Networks posted sales of EUR 9.6 billion).
Further information about ICN is available at www.siemens.com/surpass