Sunday, April 18, 2010

PMC-Sierra Enables Wireless Backhaul with GigE over OTN

PMC-Sierra introduced a reference design for its HyPHY chipset that supports standards-based transport of Ethernet-based services over OTN. ITU-T G.709 Amendment 3 specifies direct mapping of Gigabit Ethernet (GE) to the OTN layer by defining a new container for the smallest Optical Data Unit (ODU), ODU0 (1.238 Gbit/s), ensuring complete timing transparency and bandwidth efficiency of Ethernet-based client signals.

In conjunction with HyPHY's innovative support for timing synchronization over packet services, the reference design enables cost-optimized Layer 1 OTN networks with full support for Ethernet network timing distribution, a critical requirement for wireless backhaul applications.

PMC-Sierra's HyPHY chipset integrates support for mapping and multiplexing of GEs into sub-ODU1 (2.488Gbit/s) containers. The new PM5423-KIT ODU0 reference design leverages HyPHY's flexible packet interfaces and unique OTN Payload Tributary Mapping (OPTM) technology to add support for the newly defined OTN mapping modes, including:

  • Transparent GE mapping and de-mapping into/from ODU0 via GMP; and

  • ITU-T ODU0 multiplexing and de-multiplexing into/from higher order ODUks.

PMC-Sierra's HyPHY 20G delivers high capacity framing, mapping and multiplexing of Carrier Ethernet, SAN, OTN, transparent bit services such as video, and SONET/SDH to allow Carriers to reduce the number of network elements, while incrementally adding bandwidth or changing service mix per node without forklift upgrades. The platform provides client-agnostic, rate-agile Small Form-Factor Pluggable (SFP) and 10 Gigabit pluggable (XFP or SFP+) interfaces and a set of flexible system interfaces for networking to a variety of switch fabric architectures. HyPHY 10G provides a lower density option for optical platforms.


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