Ethernet over SDH (EoS): Summary

• EoS provides point-to-point LAN services over an SDH backbone

  • 10/100/1000 Mbps Ethernet tributaries (client ports) directly on the SDH equipment used to provide “leased lines”

• Rate-controllable: Dedicated “leased-line” bandwidth adapted to user demands in multiples of SDH VCs at the finest granularities possible (multiples of “E1”, “DS1” or “DS3”)

• Operators can significantly reduce equipment cost by building a unified TDM+IP network

  • Can work seamlessly with existing TDM (SDH or SONET) infrastructure

• Cost effective way to support data customers

  • Use of integrated Ethernet eliminates the need for costly WAN interfaces (E1/E3/STM-1) on routers connecting to SDH/SONET
  • WAN bandwidth can be provided directly from customers’ Ethernet switches, potentially eliminating routers at customer sites

• Bandwidth-on-demand, even for short time-periods

  • Software-control enables services like bandwidth-on-demand

• High levels of network reliability

  • SDH grade sub-50 ms protection