Ascend Partners with Analog Devices to Provide Single-Chip, RAS DSP for Voice-over-IP Processing Platform
Industry leader chooses ADI's high-density, scaleable DSP-based flexible gateway for Internet-based communications.
NORWOOD, Mass., Sept. 21 /PRNewswire/ -- Analog Devices, Inc. (NYSE: ADI - news) today announced Ascend Communications, Inc. (Nasdaq: ASND - news), selected ADI's ADSP-21mod870 single-chip, remote access server (RAS) digital signal processor (DSP), as the Voice over IP (VoIP) Gateway Processor for its MultiVoice for the Max communications platform.
Ascend is utilizing ADI's single-chip, open-platform DSP, which contains industry-leading, on-chip memory and port density, to maximize ports per chassis, deliver multiple Quality of Service (QoS) levels including Absolute QoS for toll quality voice over IP, and develop future Web-based communications, such as phone-to-PC, Web-to-phone and Web-to-agent.
Based on Ascend's MAX 6000 remote access concentrators, MultiVoice for the MAX provides an interface between the PSTN (public switched telephone network) and IP (Internet Protocol) network. The ADSP-21mod870 bridges the voice-based continuous connection switched network and the data-based IP network. The DSP's large, on-chip memory enables fast contact switching to take place in real time, allowing Ascend to deliver optimum QoS levels for low-distortion, echo-free and delay-free conversations over the Internet.
''The MAX 6000 is the actual link between the PSTN and the IP-based network,'' said Jose Garcia, Ascend Product Manager. ''ADI's gateway processors are the ideal platform for this critical interconnection. In addition, the 21mod870 single-chip RAS DSP is the best in its class for power consumption and density. These characteristics, along with ADI's extensive experience as a telecomm DSP supplier, made the choice an obvious one.''
''Implementations such as Ascend's VoIP solution underscores ADI's ability to deliver the highest performing, most flexible and extensible DSP available for the remote access server market,'' said Bob Fine, Analog Devices' Product Line Manager. ''We are pleased to be working with Ascend in this capacity and look forward to continuing to enable new and emerging capabilities through our industry-leading DSP solution.''
MultiVoice for the MAX platform conforms to the ITU-T H.323 industry standard for handling real-time, voice over IP-based packet networks. In addition, MultiVoice for the MAX incorporates service quality features, including echo cancellation and DTMF detection and generation for emulation of the PSTN.
The high-speed DMA interface and large on-chip SRAM of the ADSP-21mod870 allow it to be configured to handle a large variety of tasks. The software with the ADSP-21mod870 can be configured for modem calls or HDLC processing of digital ISDN-based calls. Since the ADSP-21mod870 is an open platform, customers can add their own unique features and extend their product to other applications.
About the ADSP-21mod870
Analog Devices' programmable single-chip solution offers the highest concentration of modem ports on a single chip and has flexibility to support analog (up to V.90), ISDN (B-channel HDLC, V.8 and V.25 start-up procedures, V.42 error correction, as well as V.42bis data and MNP Class 5 compression), X.25, Frame Relay or T1/E1 remote access, enabling server-based communication solutions for corporate environments, Internet Service Providers (ISPs) and local exchange carriers.
The ADP-21mod870 offers the industry's smallest size, measuring 0.4 square inches; the device also has the lowest dissipation per channel, consuming 140 milliwatts per port, or less than one tenth that of currently available chip sets for RAS modems. Packaging is 100-pin TQFP. Single-chip IC includes controller, memory (64K words of high speed SRAM), and data pump, requiring no external memory or data controller. Additional information is available at www.analog.com/ras.
About Ascend Communications
Ascend Communications Inc. develops, manufactures, sells and services wide area networking solutions for telecommunications carriers, Internet service providers and corporate customers worldwide. For more information about Ascend and its products, please visit the Ascend web site at ascend.com. Ascend is headquartered at One Ascend Plaza, 1701 Harbor Bay Parkway, Alameda, Calif. 94502; phone is 800-ASCEND4 and fax is 510-814-2300.
About Analog Devices
With fiscal 1997 sales of $1.24 billion, Analog Devices (NYSE: ADI - news) is a leading manufacturer of precision high-performance integrated circuits used in analog and digital signal processing applications. Headquartered in Norwood, Massachusetts, the company employs approximately 7,500 people worldwide, and has manufacturing facilities in Massachusetts, California, North Carolina, Ireland, the Philippines and Taiwan.
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SOURCE: Analog Devices, Inc. |
