RAD Granted U.S. Patent for TDM over IP Technology; Company Developing Enhanced TDMoIP/MPLS Access Products.Business Editors/High-Tech Writers TEL AVIV, Israel--(BUSINESS WIRE)--May 18, 2004 The United States Patent and Trademark Office The United States Patent and Trademark Office (PTO or USPTO) is an agency in the United States Department of Commerce that provides patent protection to inventors and businesses for their inventions, and trademark registration for product and intellectual property has granted a patent to RAD Data Communications RAD Data Communications (also known as "RAD") is a privately held corporation, based in Tel Aviv, Israel, that designs and manufacturers specialized networking equipment. It was founded in 1981 by Zohar Zisapel and his brother, Yehuda. for TDM (Time Division Multiplexing) A technology that transmits multiple signals simultaneously over a single transmission path. Each lower-speed signal is time sliced into one high-speed transmission. over Internet Protocol (TDMoIP(R)) technology. U.S. patent 6,731,649 describes a method for transporting one or more TDM links over packet switched IP networks. A TDMoIP gateway encapsulates segments of the constant rate TDM in AAL (ATM Adaption Layer) The part of the ATM protocol that breaks up application packets into 48-byte payloads which become ATM cells when the 5-byte headers are attached. The AAL resides between the higher layer transport protocols and the ATM layer. 1 cells, which are carried in UDP/IP Refers to the use of UDP packets over IP. UDP does not guarantee reliable delivery, whereas TCP does. See UDP. packets. A second TDMoIP gateway at the destination regenerates the clock, strips the UDP/IP headers and delivers a synchronous bit stream. This solution also provides an adaptive clock for clock transfer across the entire network. Carrier and enterprise markets alike use TDMoIP technology to provide connectivity for enterprise PBXs and data equipment over private and public packet networks, service provider circuit emulation services, cellular backhaul, SS7 transport, disaster recovery and other voice, video and data/telemetry applications. More Than 20,000 TDMoIP E1/T1 Ports Shipped Since it first introduced the technology to the market in 1999 with the launch of its IPmux line of TDM over IP gateways, RAD has shipped more than 20,000 TDMoIP E1/T1 ports. Earlier this year, RAD unveiled its IR-TDMoIP gateway module, a PCI Mezzanine Card (hardware) PCI Mezzanine Card - (PMC) A family of low profile mezzanine cards for VMEbus, Futurebus+, desktop computers and other computer systems with logical and electrical layers based on the Peripheral Component Interconnect (PCI) specification. PMC is defined in IEEE P1386. (PMC (1) See Portable Media Center. (2) (PCI Mezzanine Card) A PCI-based mezzanine card that is widely adapted to VMEbus, CompactPCI and PCI cards. ) based on the company's TDMoIP chip. Both the module and the chip are now available for OEM sales. "This patent is yet another sign of RAD's continued leadership in setting the standard for the industry in its development of legacy over IP access devices," stated Yoram Holtz, Vice President of Marketing at RAD Data Communications. Last year, moreover, RAD became the first vendor to announce compliance with the MPLS (1) (MultiProtocol Lambda Switching) The earlier name for GMPLS. See GMPLS. (2) (MultiProtocol Label Switching) A standard from the IETF for including routing information in the packets of an IP network. and Frame Relay Alliance's Implementation Agreement (IA) 4.0, "TDM Transport over MPLS using AAL1." "RAD is now at work developing enhanced TDMoIP/MPLS capabilities for a range of access products, including dedicated multiservice access devices for Ethernet and MPLS networks," Holtz added. About RAD Established in 1981, privately owned RAD Data Communications has achieved international recognition as a major manufacturer of high quality access equipment for data communications and telecommunications applications. These solutions serve the data and voice access requirements of service providers, incumbent and new carriers, and enterprise networks, by reducing infrastructure investment costs while boosting competitiveness and profitability. The company's installed base exceeds 8,000,000 units and includes more than 150 carriers and operators around the world. These customers are supported by 19 RAD offices and more than 200 distributors in 105 countries. RAD is a member of the RAD Group of companies, a world leader in networking and internetworking product solutions. RAD Data Communications site: www.rad.com |
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