PMC-Sierra quad-port EPON OLT SoCs target FTTH, mobile backhaul

PMC-Sierra, Inc. (Nasdaq:PMCS) has unveiled its latest EPON OLT system-on-chip (SoC) family. The quad-port PAS5400 devices integrate four 1-Gbps EPON MACs and feature integrated traffic management and packet processing, power-save modes that allow remote power down of customer premises equipment, in-band optical fiber testing, and support for mobile backhaul as well as fiber to the home (FTTH).

PMC-Sierra, Inc. (Nasdaq:PMCS) has unveiled its latest EPON OLT system-on-chip (SoC) family. The quad-port PAS5400 devices integrate four 1-Gbps EPON MACs and feature integrated traffic management and packet processing, power-save modes that allow remote power down of customer premises equipment, in-band optical fiber testing, and support for mobile backhaul as well as fiber to the home (FTTH).

PMC’s new EPON OLT family includes three SoCs that comply with IEEE 802.3ah and China carrier specifications for EPON networks:

  1. PAS5404 with ‘lite’ traffic management
  2. PAS5414 with full traffic management
  3. PAS5424 with full traffic management and a cascading option designed to eliminate the need for an aggregation switch on the OLT line card.

All three devices include an optical diagnostic function – basically, an integrated in-band optical time-domain reflectometer (OTDR) -- which PMC-Sierra asserts is the first on the market. The function enables in-service test of the fiber-optic transmission line. The function can locate problems within a few meters, the company says.

The chips also integrate a network power save controller, which leverages an algorithm for ONU remote power-down at idle periods and recovery of full operation without losing data. The use of the PAS5400 with PMC’s PAS6500 EPON ONU SoC can reduce ONU power consumption by up to 80 percent, the company claims. Meanwhile, integrated traffic management and packet processing enable deep packet inspection and support of IPv4 and IPv6 protocols. The integrated wire-speed traffic management function obviates the need for a separate traffic management device.

Multiple PAS5400 devices can be cascaded to connect directly to the backplane using the integrated cascading function. This ability enables high port-count OLT line cards, while eliminating the need for a separate aggregation switch on board. And support of such synchronization approaches as IEEE 1588v2, Synchronous Ethernet, and Time of Day delivery over EPON, means carriers can use EPON as the uplink to mobile backhaul networks.

All devices integrate four 1-Gbps upstream and downstream PON channels, including the EPON MAC, SERDES and fast-locking Burst Mode CDR (BMCDR), and support SGMII, XAUI and RXAUI backplane interfaces. The SoC family supports Automatic Protection Switching (APS) on chip.

The PAS5404 reference designs are available now and the reference designs for PAS5414 and PAS5424 will be available in Q3 2011. The complete EPON OLT software package is compatible with PMC’s PAS5201 and PAS5204 1G-EPON OLT software and with PAS8400 10G-EPON software and is portable to any real-time operating system, such as Linux and VxWorks, and to any processor. The software design kit features an EPON protocol stack, a complete set of traffic management drivers, IEEE 802.3ah OAM protocol, including operator-specific stacks, optical diagnostics functions, and pre-integrated peripheral drivers.

The PAS5400 devices are sampling to select customers.

Visit PMC-Sierra

More in Optical Tech