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 Wednesday, 13 September 2006

Interoperability between equipment using the ITU-T Recommendation G.984 for passive optical network (G-PON) has been demonstrated at an independent test laboratory, KTL in Santa Clara, California.

PON technology is used in the local loop to connect residential and SME end users premises in an all-fibre network. The event organized by the Full Service Access Network (FSAN) Group demonstrated service level interoperability between several vendors.

ITU-T Recommendation G.984 enables line rates of 2.5 Gbps in the downstream (central office to customer) and 1.2 Gbps in the upstream (customer to central office) to handle the bandwidth requirements for services like HD IPTV, online-gaming, Ethernet services, VoIP and TDM over fibre. In addition it offers more efficient IP and Ethernet handling.

FSAN together with ITU have hosted a series of B-PON and G-PON interoperability events over the years. The recent event, involved voice, data and IPTV testing between the following system vendors: Calix, Cambridge Industries Group, Entrisphere, Fujitsu, Hitachi, Huawei, Iamba Networks, Mitsubishi Electric, NEC, Siemens, Terawave. Shenick provided IPTV and data testing with quality of experience (QoE) and performance assessment. Spirent provided its triple play test solution to verify voice, video, and data service performance and functionality with 'real world' scenarios. Corning provided the complete optical distribution network (ODN) for the event, including the optical fibre, cable, splitters, cabinet, terminal distribution system, and connectorized drop cables.

The multi-vendor G-PON systems were used to transport voice, data and IPTV between the optical networking terminals (ONTs) and the optical line terminals (OLTs). Service provisioning of triple-play services was done via the ONT management and control interface (OMCI). Detailed test cases where used to verify quality and performance of services in a multi-vendor environment.

"We are very pleased with the achievement of VoIP and IPTV as well as other services working across a mix of vendor equipment," said Michael Brusca, Verizon Communications, Chair FSAN Interoperability Task Group. "We have overcome the challenge of OMCI interoperability that built on our previous physical layer testing, within a year after specifying its enhancements. G-PON is now mature and ready for mass deployment."

Don Clarke, 21CN chief access designer for BT Wholesale: "We are actively supporting FSAN and the ITU-T in their endeavor to achieve interoperability for GPON equipment. Interoperability will help drive down costs and leverage innovation in the customer termination space."

A public G-PON Interop Showcase is planned for ITU TELECOM WORLD 2006 this December in Hong Kong.