Assistive Communication Devices
TTY (Text Telephony) and TDD (Telecommunications Device for the Deaf) allow individuals who are deaf, hard of hearing, or have speech or language disabilities to communicate by telephone.
When a user types his or her conversation on a TTY keyboard, it is transmitted as tones through the telephone. Tones are received by the other person’s TTY, translated into text and displayed on the screen. In order to use the TTY network, you must have a
Keyboard Codes
You may use the keyboard codes under certain conditions. The following table lists and describes the keyboard codes messages.
Item | Keyboard code | Meaning | |
| ##11* | Setting the voice volume to level 1 | |
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Volume adjustment | ##12* | Setting the voice volume to level 2 | |
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##13* | Setting the voice volume to level 3 | ||
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| ##14* | Setting the voice volume to level 4 | |
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Voicemail quick codes | *86 | Accessing the voicemail | |
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Call forwarding activate | *72+NUM | Activating Call Forwarding | |
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Call forwarding | *720 | Deactivating Call Forwarding | |
deactivate | |||
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| ##56*0# | Activating TTY off mode | |
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TTY | ##56*1# | Activating TTY full mode | |
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##56*2# | Activating VCO (voice carry over) mode | ||
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| ##56*3# | Activating HCO (hearing carry over) mode | |
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Turn off voicemail | ##54*0# | Turning off voicemail indicator from device | |
indicator | |||
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Note: NUM is the phone number where you want calls to be forwarded.
General Functions | 13 |