Using ASCII

For computers and TTYs to communicate with each other, each device must be properly set. Following is a list of setting for various combinations of devices.

 

PC and TTY

Personal computer users can call the relay center (which has Hayes compatible modems) by using the following configuration:

  • 300 or 1200 Baud (if you have a choice, use 300)
  • 8 bit ASCII Code
  • No parity
  • 1 stop bit
  • Half duplex
  • No X-modes required (no flow control)
  • No terminal emulation or TTY emulation
  • Dialing timeout at longest possible time, infinity preferred
  • Local Echo ON (may be called "Echo Typed Characters Locally")

 

PC and ASCII TTY or ASCII TTY and TRS

NOTE: Not all TTY’s have ASCII capability. Make sure the TTY you want connected with your PC has this capability.

  • 300 Baud
  • 8 bit ASCII Code
  • No parity
  • Half duplex

 

PC and Baudot TTY

A specialized modem with Baudot capability is required. PC settings will be dictated by the PC software being used.

NOTE: Voice Carry Over (VCO) and Hearing Carry Over (HCO) cannot be used with ASCII—except when using 2-line versions of these calls.

 

When making an American Standard Code for Information Interchange (ASCII) call, please dial: 1-888-842-3372

An AZRS communication assistant (CA) will answer like this:
AZRS CA 4999 (F) NMBR CALLING PLS GA

You answer with the number you want to call, also giving them the extension if necessary:
Pls call 602-555-1234 GA
Pls call 602-555-1234 x345 GA
The communication assistant will then dial the number, informing you of the call process as they connect your call:
DIALING 602-444-1234 RINGING 1... RINGING 2... RINGING 3...

When the call is answered, the communication assistant will begin relaying your call.
The communication assistant will explain AZRS to the other person if they are unfamiliar with the relay service.

HELLO (F) (EXPLAINING RELAY) HELLO THIS IS CHRISTI GA
Your call is now connected. The communication assistant will then relay the call between yourself and your party; typing the standard phone user's spoken words to the TTY user and then voicing the TTY user's text back to the standard phone user.

Remember to end each exchange with "GA" (Go-Ahead). This is a turn-taking cue that informs both the communication assistant and your party when to respond. When you are ready to end your conversation, say "SK" (Stop Keying).