Centerpoint partners with Zaffire, Gotham Networks and LuxN to demonstrate SCM interoperability at NFOEC

July 12, 2001
July 12, 2001--NFOEC--Centerpoint Broadband Technologies, Inc. unveiled what the company claims to be the first interoperability demonstration of 20 Gbps subcarrier multiplexing (SCM) over Dense Wave Division Multiplexing (DWDM) at the National Fiber Optic Engineers Conference show in Baltimore this week.

Centerpoint Broadband Technologies, Inc., dedicated to delivering bandwidth efficient technology that maximizes the performance of optical and transport networks, unveiled what the company claims to be the first interoperability demonstration of 20 Gbps subcarrier multiplexing (SCM) over Dense Wave Division Multiplexing (DWDM) at the National Fiber Optic Engineers Conference (NFOEC) show in Baltimore this week.

Centerpoint has partnered with Gotham Networks and LuxN and recently acquired Zaffire, demonstrating interoperability between the Centerpoint Lightwave Efficient Network Solution (LENS) 1220, metro access, and DWDM equipment. The demonstration shows that together SCM and DWDM can dramatically improve the bandwidth efficiency and scalability of optical networks.

The demonstration network is a two-fiber, point-to-point interconnection that includes four 20 Gbps SCM channels (a total of 80 Gbps SCM capacity) plus four OC-48 channels on eight total wavelengths over spans of 80 km per fiber. The SCM signals are interleaved with four OC-48 signals on adjacent 100 GHz spaced IT channels. Configuration, control and monitoring of the LENS system is performed remotely using the Vista Enhanced Craft Interface (ECI).

On the input side, LENS aggregates mixed signals including OC-12, OC-48, Gigabit Ethernet, IP, and a live ATM over SONET video feed, proving that SCM can aggregate a wide range of high bandwidth mixed traffic. The demo also showed optical flexibility, dropping one channel while passing the remaining seven.

Products and systems featured in the demonstration include:

Zaffire Z3000 Optical Service Platform

The LENS systems' subcarrier multiplexed traffic is carried transparently over four ITU grid wavelengths through the Zaffire 3000 DWDM system along with four additional interleaved wavelengths carrying SONET OC-48 signals. The Z3000 Series is the first system purpose-built for metro and regional carriers, giving service providers a cost-effective alternative to stacking SONET/SDH rings or adding ever-increasing amounts of dark fiber. For more information, visit

Gotham Networks GN 1600 Switchless Switch

Live video from the camera in Centerpoint's booth is aggregated and switched by Gotham's GN 1600 Switchless Switch and handed off to the LENS system for transport on an OC-48 rate interface. The video is transported within a LENS SCM signal over the DWDM system, demultiplexed and returned to the GN 1600 for processing and switching at OC48c line rate, then sent to the video converter and monitor. The Gotham Networks Switchless Switch product family, the GN 1600 and GN 400, is a software-configurable switching and routing platform that provides any service - IP, MPLS, Frame Relay, ATM, and Packet over SONET - on any port from DS0 to OC-192. For more information, visit

LuxN WavSystem WS 3217 Optical Service Platform

The LENS system aggregates four OC-12 signals received via standard SONET interfaces from the LuxN WS 3217, which provides optical transport for these signals over four wavelengths. The LuxN WavSystem optical networking product family provides Layer 1 transport for metro access and metro ring applications. The WS 3217 is compact and powerful, multiplexing up to eight wavelengths on a fiber of T1, 10/100 Ethernet, Fibre Channel, SONET OC-3/12/48 or Gigabit Ethernet, all in a 6 RU package. The WS 3217 is supported by LuxN's Optical Service Level Management System (OSLMs). For more information, visit

About Centerpoint Broadband Technologies, Inc.:

Centerpoint Broadband Technologies, Inc., headquartered in San Jose, California, is an optical networking company dedicated to delivering high capacity optical and broadband wireless systems that allow service providers to build highly scalable, dynamically flexible, cost effective networks. Centerpoint's optical systems utilize Subcarrier Multiplexing (SCM) technology to aggregate and transport multi-service traffic within optical networks at rates of up to 20 Gbps per wavelength. For more information, visit

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