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BroadLight unveils new GPON chip

Posted: 24 May 2006 ?? ?Print Version ?Bookmark and Share

Keywords:BL2340? BL2338? optical network termination chip? BroadLight? Loring Wirbel?

BroadLight Inc. is introducing an optical network termination chip for multi-tenant/multi-dwelling applications using gigabit passive optical networking (GPON) infrastructure. The BL2340 will be used primarily in Asian deployments, where high-density access is more prevalent, while North American GPON networks will use the existing BL2338.

Dan Parsons, director of marketing at BroadLight, said the new chip is designed to handle multiple Internet Protocol TV and HDTV streams over a PON infrastructure. It has direct interfaces to DDR2 SDRAM, subscriber-line circuits for analog voice, VoIP chips and Layer 2 Ethernet switches.

Both of BroadLight's optical network termination SoC solutions are used with a BL3000 media-access control (MAC) device on the line-termination end and the PONmaker software suites.

The BL2340 and earlier BL2338 are based on the company's Runner PON processor, in which control-plane and data-plane processing are segmented, allowing the bridging of full-duplex Gigabit Ethernet services at wire speed onto the passive optical network. The chip offers the data prioritization to control Ethernet class-of-service functions at network speeds.

While some PON chip set providers have focused on Ethernet PON markets, BroadLight has concentrated on the G.983 broadband PON and G.984 gigabit PON standards. More than 25 customers globally have designed its GPON architecture into their products.

Parsons said that some BPON business remains, but GPON is showing fast growth, thanks to power consumption and network architecture that have proven superior to Ethernet PONs. "With the latest round of IPTV rollouts, we find ourselves competing primarily with other GPON vendors," Parsons said.

The next steps for the BL2000 family will involve embedding PHY interface functions and, eventually, VoIP DSP functions in the core Runner processors. For the BL3000 MAC, more control channels will be embedded in future versions.

- Loring Wirbel
EE Times

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