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Type of feature
The TDD (Telecommunications Device for the Deaf) modem is an optional feature.
About the TDD modem feature
Although called a modem, the TDD modem might better be called a TDD recognizer. This is a software package�and not a hardware device�that can be used in IVR applications to allow communications with the hearing-impaired, in compliance with Section 508 of the federal Rehabilitation Act of 1973.
The TDD modem acts much like a speech recognizer. It even uses the speech proxy server to communicate with the Avaya IR server. When the IR system receives a TDD tone, that tone is passed to the TDD modem. The TDD software then uses a grammar-like algorithm to determine the corresponding DTMF tone, which it then returns to the IR system.
Hardware requirements
At least one digital telephony card must be installed and operational.
Software requirements
This feature requires the TDD modem package (tdd). For more information, see TDD modem package.
