TTY Automated Attendant
It is recommended that the TDD announcement set be running when
administering the TTY automated attendant menus. If the TDD announcement set
is not running, you can put your ear to the handset resting in the TTY acoustic
coupler to hear the spoken DEFINITY AUDIX announcements you need to follow
while administering the automated attendant menus.
Office Telephone Systems
Guidelines for setting up TTY automated attendant menus. There are some
guidelines the system administrator should follow when setting up TTY
automated attendant menus. TTYs use the Baudot communications protocol in
which the same five-bit code can represent either a letter or a non-alphabetic
character, such as a number or figure. (For example, the binary code 00001 is
both the letter E and the number 3.) This sharing of five-bit codes is made
possible by having two modes, a letters mode and a numbers/figures mode.
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If a receiving TTY is set to letters mode (by receiving the five-bit code 11111),
then the TTY assumes all subsequent five-bit character codes received are
letters. By contrast, if a receiving TTY is set to numbers/figures mode (by
receiving the five-bit code 11011), then the TTY assumes all subsequent five-bit
character codes received are numbers and figures. This is important; when a
TTY is not in the same mode as the device that is transmitting to it, the characters
that display on the receiving TTY will make no sense to the user.
All DEFINITY AUDIX TDD announcements contain the appropriate mode reset
codes to ensure that the receiving TTY stays mode-synchronized with the
DEFINITY AUDIX system during announcement playback. It is, however, the
system administrator’s responsibility to ensure mode synchronization when
recording automated attendant menus.
Mode synchronization when recording menus. Some TTYs have both a letters
key and a numbers/figures key for switching to the indicated mode. If the first
character in an automated attendant menu is a letter, press the letters key before
you type anything else; or, if the first character in an automated attendant menu
is a number or figure, press the numbers/figures key before you type anything
else.
Most TTYs do not have a letters key and a numbers/figures key. If you do not
have separate letters and numbers/figures keys, synchronization of modes is
less convenient but can be accomplished in the following way:
- If the first character you need to type is a letter, enter a slash (/); then
press the space bar a few times before you start typing. This causes the
system to reset to letters mode.
- If the first character you need to type is a number or figure, type x; then
press the space bar a few times before you start typing. This causes the
system to reset to numbers/figures mode.
TTY users need to use both the keypad on their touch-tone telephone and the keyboard on the TTY. In menu instructions, make it clear which to use. You might
want to use dial when the user needs to use the telephone keypad and type
when the user needs to use the TTY keyboard.
When using a TTY to type directly to the DEFINITY AUDIX system, the DEFINITY
AUDIX system captures and preserves any hesitations in typings, misspellings,
and so on. For this reason, it is recommended that system administrators use a
TTY with a built-in buffer and completely edit the menu before calling the
DEFINITY AUDIX system to download the buffer. See your TTY user’s guide for
instructions on editing and downloading the TTY buffer.
TTY Automated Attendant
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