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Analog Devices New Technology for High Quality Phone Calls over the Internet
Analog Devices Voice Processing Technology Enables Toll-Quality Calls Over The Internet
Analog Devices,
has introduced a new signal processing software technology that enables
the Internet to be used for toll-quality telephone conversations. ADI’s
Dynamic Internet Voice Access™(DIVA) technology, which runs on ADI’s
family of Internet Gateway Processors, achieves an industry-leading 40
channels of voice on a single chip and offers the industry’s highest
Quality of Service (QoS). Designed for networking equipment that connects
the existing public switched telephone networks (PSTN) to the Internet,
DIVA is the first solution available to address both the voice-quality
issues critical to wide-scale adoption of voice over network (VON)
applications, and the capacity issues critical to cost-effective
deployment. The DIVA solution achieves toll-quality by dynamically
adapting the voice processing to variations in the packet network, making
the packet network transparent to the end-user. ADI’s signal processing
technology is a key enabler for operators, corporations and individuals to
take full advantage of emerging voice over network services and save on
operating costs and long distance calls.
The DIVA solution is
optimized for trunking gateways,the largest and fastest-growing segment of
the VON industry. Trunking gateways are multi-channel access concentrators
that provide a single point of access to the Internet, regardless of
connection type (VoIP, DSL, cable, PBX, LAN, POTS). They convert data or
voice signals from the PSTN to the packetized data and voice Internet
protocol (IP) network and vice-versa. According to Probe Research, the
trunking gateway segment of the VON industry is expected to grow to over
one billion dollars by 2001.
“Trunking gateway equipment is
selling today because it utilizes the PSTN for the ‘last mile’ connection
to subscribers, overcoming the access and QoS issues of other VON segments
including VoIP phones and H.323 gateways,” said Robert Conrad, vice
president, Digital Signal Processor Products Division, Analog Devices.
“Networking bandwidth is doubling every nine months, driven by new voice
and data services. ADI’s strategy since 1997 has been to provide the same
rate of capacity increase in our signal processing products.”
"Analog Devices is an established leader in delivering access
solutions that keep up with bandwidth trends," said Laurent Guengank,
senior consultant specializing in voice services, from TeleChoice Inc.
"The DIVA solution lets OEMs and system integrators easily add features
and functions to their trunking gateway products, while providing
breakthrough capacity and the highest quality of service. Today's
announcement underscores Analog Devices’ ability to achieve breakthrough
engineering that enables the infrastructure side of the converged
network."
The 40-channel solution features the ADSP-21mod980
Internet Gateway Processor and the new DIVA software. In addition to
achieving breakthroughs in channel capacity and QoS, this solution
consumes only 25mWatts of power per port. The low power consumption
enables original equipment manufacturers to double the density within
existing boxes.
“Analog Devices continues to be an aggressive
player in embedded DSP solutions. The company’s introduction of DIVA is a
significant contribution to the rapidly growing IP telephony market,” said
Will Strauss, president of Forward Concepts. “This is a market segment
that demands high port capacity implemented in a limited space. It is
further constrained by power consumption. DIVA is a product that is
well-suited to address these requirements.”
The ADSP-21mod980 solution integrates the
600 million instructions per second (MIPS) digital signal processor (DSP)
with voice coding, echo cancellation, RTP framing and adaptive jitter
buffer management software. A total of 16 Megabits of on-chip Random
Access Memory (RAM) eliminates the need to use external memory and makes
designing high capacity systems easier. The ADSP-21mod980 solution
provides dedicated resources for each voice channel, making each fully
independent from the others. The adaptive jitter buffer management
component of the DIVA technology compensates for disruptive network
characteristics such as throughput variability and changing traffic mix.
The end result is that data is delivered to the speech codec subsystem in
real-time and at a constant rate, yielding a high-quality call.
Pricing & Availability
The ADSP-21mod980 solution
is currently sampling. High volume production will begin in April 2000.
Pricing in 1,000 units ranges from $240 to $280 per unit, depending on
software configuration. For more information, visit
http://www.analog.com/ras.
ADI's Internet Gateway Processor
Solutions
The ADSP-21mod980 is the company's third single-chip
Internet Gateway Processor. Since the introduction of the ADSP-21mod870 in
1997, ADI has successfully doubled density every nine months and achieved
the goal of providing industry-leading density and support for evolving
Internet protocols and data types. ADI's family of Internet Gateway
Processors are embedded 16-bit DSPs and software solutions, such as
Dynamic Internet Voice Access (DIVA) Technology. The family has enabled
the development of new Internet access products including high-density
remote access servers and remote access concentrators, in addition to
modem test equipment, VoIP systems and multi-service gateways. The
ADSP-21mod-Series has currently been adopted and deployed by a number of
industry leaders, including Lucent InterNetworking Systems, Brooktrout,
Ericsson, Mapletree Networks, Netaccess and Digi International.
The company's Web site address is http://www.analog.com/.
[Reprinted with kind permission from Analogue Devices Inc.]
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