August 9 Ottawa, Canada -- Zarlink Semiconductor has completed interoperability testing of its CESoP (circuit emulation services-over-packet) technology with BroadLight, a vendor of PON chips, transceivers, and software. Using the companies' combined technologies, service providers can deploy GPON access networks that support "triple play" voice, video, and data applications and T1/E1 voice, leased line and frame relay services.
"Carriers are seeking ways to add TDM service support to the new GPON infrastructure, rather than incur the expense of maintaining existing circuit networks," said Bruce Ernhofer, product manager, packet processing, Zarlink Semiconductor. "CESoP is a key bridging technology that allows carriers to seamlessly support TDM services over a packet network, without endangering existing revenues or requiring an equipment upgrade on the part of their customers."
The tested solution, based on Zarlink's CESoP technology and BroadLight's BL3238 OLT MAC, supports the delivery of TDM-based services across central office and customer premises GPON equipment. Using CESoP technology in the OLT, circuit-switched traffic along with associated timing and signaling information is converted into IP or Ethernet packets and tunneled across the GPON. At the OLT, GPON access blades supporting TDM services do not need to include TDM circuitry and backplane connectivity.
At the business CPE, Zarlink's CESoP technology and BroadLight's BL2340 ONU SoC work together to enable carriers to quickly deploy high-margin, revenue-generating channelized, fractional, and clear channel T1/E1 services.
Testing proved BroadLight's GPON and Zarlink's CESoP products meet performance demands for equipment delivering both triple-play and TDM services over fiber-based networks. Testing demonstrated the performance of T1 and E1 trunks carried over GPON, as well as clock recovery accuracy and latency and packet delay variation (PDV) measurements in the test network. Clock recovery performance was better than 15 parts per billion.
"Combining our GPON technology with Zarlink's CESoP expertise simplifies the integration and time-to-market of legacy equipment and services with fiber access networks," said Doron Tal, director of product marketing, BroadLight. "Using CESoP to transport TDM traffic significantly reduces the design costs and complexity of OLT and ONT systems, allowing carriers to rapidly deploy GPON networks supporting the complete range of telecommunication services."