RAD Introduces Next-Generation Pseudowire Gateway

16 July 2007: RAD Data Communications, the telecommunications industry pioneer of pseudowire technology, has unveiled its feature-rich IPmux-24 Gigabit Ethernet pseudowire gateway.

"The IPmux-24 represents the next generation in pseudowire access solutions," states Ron Agam, Senior Product Line Manager at RAD Data Communications. "What makes it unique is that it combines Fast Ethernet and Gigabit Ethernet switching with the widest support of pseudowire standards in the industry and ASIC-driven high performance including precise clock recovery and ultra low latency," he adds. RAD’s next generation pseudowire gateways are the only ones on the market capable of supporting all modes of TDM emulation, including TDMoIP, CESoPSN and SAToP-RFC 4553.

"The IPmux-24 allows cellular backhaul transport providers to meet the specific needs of mobile operators," Agam explains. "Because these providers host multiple operators, they must be able to simultaneously support each operator's chosen backhaul technology, from delay-sensitive CDMA and EVDO to timing-sensitive GSM and UMTS," he adds. RAD's new ASIC enables the IPmux-24 to transport backhaul traffic over IP, Ethernet or MPLS networks using any standard TDM emulation technology, and with the lowest latency and most precise timing. For advanced data services, such as 4G WiMAX, the IPmux-24 can also be used as an Ethernet demarcation device based on its flexible Ethernet bridge support for 802.1D and 802.1Q networks, including Q-in-Q and rate limitation, while ensuring the priority and quality of the TDM service.

Similarly, the IPmux-24 pseudowire gateway can be deployed to replace expensive leased lines by transporting TDM traffic over less-costly Fast Ethernet and Gigabit Ethernet networks.

Delivering carrier-class TDM services requires sophisticated clock recovery technology. RAD has solved this problem by incorporating into its ASIC an advanced adaptive clock recovery mechanism that conforms to the G.823 sync interface using G.8261-defined scenarios and achieves 16 ppb clock accuracy. Clock redundancy can be achieved through a system-timing feature that uses master and fallback timing sources. Moreover, timing can be input or output to external peripherals through an optional external clock port.

The IPmux-24 ensures accurate regeneration of timing on a per-port basis to support multiple customers' timing needs, in-band facility loopbacks to allow customers to test their circuits independently of the transport provider, and VLAN-aware/unaware bridging with ingress and egress rate limiting to provide tunable bandwidth.

RAD's unique advanced adaptive clock technology requires no additional bandwidth or special protocol, since it rebuilds the original clock from the original pseudowire. This helps ensure that the IPmux-24 will be interoperable with other pseudowire solutions for purposes of clock recovery. In addition, the product is fully manageable and offers a full suite of OAM capabilities.

"The IPmux-24 is truly a one-box solution for the transport provider to service multiple operators," Agam concludes.