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Avaya IP Telephony Solutions Score Highest Marks in IndependentTests of Support for People with Disabilities

  • Benchmark tests document virtually flawless performance against competition in real-world scenarios; Special features, embedded within Avaya systems, provide access for people who use TTYs and for people who are blind

Avaya announced that the company's Internet protocol (IP) telephony solutions outperformed other solutions in industry benchmark tests that measured their ability to transmit teletypewriter, or TTY, signals reliably over an IP network.

Avaya (NYSE: AV), a leading global provider of communications networks and services for businesses, today announced that the company's Internet protocol (IP) telephony solutions outperformed other solutions in industry benchmark tests that measured their ability to transmit teletypewriter, or TTY, signals reliably over an IP network. A TTY is a text terminal that is commonly used in place of telephones by people who have difficulty hearing or speaking.1

"The ability of this Internet-based system to transmit TTY signals reliably preserves the independence of persons who are deaf or hard-of-hearing in a manner that allows employees and employers to take advantage of the benefits provided by IP telephones," said Patricia Pound, executive director of the Texas Governor's Committee on People with Disabilities and vice chair of the National Council on Disability. "Options just expanded for government agencies to satisfy accessible purchasing requirements."

Avaya is an industry leader in the development of communications solutions for people with disabilities and builds accessibility features into the same industry-leading communication solutions used by businesses and government organizations worldwide. The company has been honored for its work in accessibility by the Association of Access Engineering Specialists and by the Florida Coalition of Disability Rights.

The Tolly Group compared the performance of Avaya Communication Manager running on an Avaya Media Server and Media Gateway with the Cisco Systems Call Manager and both the 1751-V Multiservice Modular Access Router and the ATA 188 analog telephone adapter.

Avaya's systems performed flawlessly under five separate test scenarios with uncompressed audio transmissions - successfully navigating network packet losses of up to 10 percent that were designed to simulate real-world conditions on an IP network. In each instance, TTY messages were transmitted accurately and reliably. When the same tests were conducted with the compressed audio encoding that is typical of many wide area networks, Avaya systems still exhibited an error rate of less than one percent - even under the most extreme packet-loss conditions.

"These test results are great news for TTY users who expect telecom systems to provide error-free transmissions of their messages," said Steve Jacobs, President of IDEAL Group and a former member of the FCC's Consumer/Disability Telecommunications Advisory Committee.

FCC regulations, as well as federal procurement requirements established under Section 508 of the Rehabilitation Act Amendments, require telephony systems to support TTY transmissions and be accessible to people with disabilities.

The Tolly Group, a leading research, certification and testing firm experienced in the evaluation of information technologies, conducted the tests under its Tolly Verified certification program. The Tolly Group's benchmark tests were sponsored by Avaya and conducted under the organization's Fair Testing Charter - a set of principles that The Tolly Group follows to make its tests fair, balanced, accurate and repeatable.

In addition to providing TTY on IP transmission reliability, Avaya supports accessibility through a number of features built into Avaya MultiVantage Communications Applications suite, including:

  • Avaya Universal Access Phone Status software, which provides audible output of all of the information that sighted users are able to obtain by looking at a telephone's text displays and colored lamps. (For users who have trouble hearing, this software provides a highly animated pop-up window on their PC whenever there is an incoming call.)
  • Avaya Speech Access for Communication Manager that allows people with visual or mobility impairments to access a corporate phone directory, place or transfer a call, establish a conference or remotely activate call forwarding with spoken commands.
  • Avaya Self-Service Solutions (Interactive Voice Response) that supports speech access and are interoperable with TTY/TDD terminals.
  • Avaya Messaging Solutions (INTUITY AUDIX®, Modular Messaging and IP Office VoiceMail Pro) that include TTY interfaces, which provide access to the same messaging capabilities available to voice-only users.

The full Tolly Group test results reports on the TTY over IP and other Section 508-related accessibility features can be viewed online at:

About Avaya
Avaya Inc. designs, builds and manages communications networks for more than 1 million businesses worldwide, including 90 percent of the FORTUNE 500®. Focused on businesses large to small, Avaya is a world leader in secure and reliable Internet Protocol (IP) telephony systems and communications software applications and services.

Driving the convergence of voice and data communications with business applications - and distinguished by comprehensive worldwide services - Avaya helps customers leverage existing and new networks to achieve superior business results. For more information visit the Avaya Web site:

About The Tolly Group
The Tolly Group, an independent testing and strategic consulting organization based in Boca Raton, FL., offers a full range of services designed to furnish both the vendor and end-user communities with authoritative and unbiased information. Additionally, The Tolly Group is recognized worldwide for its expertise in assessing leading-edge technologies. For more information on The Tolly Group's services, visit its Web site at, E-mail, call (561) 391-5610, or fax (561) 391-5810.

1 Also known as a TDD - telecommunication device for the deaf.

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