Cortina Systems adds wireless backhaul support to PON chips

MAY 25, 2010 By Stephen Hardy -- Recognizing that their customers hope to fulfill more requirements than residential and business triple-play service provision, Cortina Systems, Inc. has unveiled EPON and GPON chips designed to support wireless backhaul applications.

MAY 25, 2010 By Stephen Hardy -- Recognizing that their customers hope to fulfill more requirements than residential and business triple-play service provision, Cortina Systems, Inc. has unveiled EPON and GPON chips designed to support wireless backhaul applications. The new CS8017 EPON ONU, CS8210 GPON ONU, and CS8022 OLT chips also boast enhanced VoIP support in the ONU devices and integrated Ethernet switching in the OLT unit, says a Cortina source.

Fred Olsson, director of the Access Business Unit at Cortina, says the new PON devices are designed to increase system density plus simplify board design. For example, the CS8022 is a quad EPON OLT device with an integrated Ethernet switch. It has a XAUI interface to communicate with emerging 10G OLT backplanes; XAUI cascading enables high-density card designs, Olsson says. The chip also features five processor cores, one for dynamic bandwidth allocation support for each EPON port and the fifth for management functions.

The device’s traffic management enables hierarchy schedulers, multi-level shaping, policing, and rate limiting as well as subscriber/service-based bandwidth management.

The CS8017 EPON and CS8210 GPON ONU devices offer an integrated VoIP processor. They provide four ports for Fast Ethernet data (or two of Gigabit Ethernet) and two or four for voice, depending upon design requirements. They complement Cortina’s existing MDU-focused devices by providing features for single-unit applications.

But the unique features of these devices are their wireless backhaul features, specifically support for applications. The CS8022 OLT chip offers synchronization support via PTP, IEEE 802.1AS, and Synchronous Ethernet; the ONUs via the IEEE 1588, 1PPS, and 802.1AS standards.

The new devices offer a matching OLT/ONU approach for EPON-based wireless backhaul. While Olsson was hesitant to reveal the company’s plans, a wireless-friendly GPON OLT to pair with the CS8210 ONU would appear to be in the cards.

All of the new devices are currently sampling, Olsson says. Production quantities should be available by the end of the year, he adds.

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