AT&T SYSTEM 25 Manual page 179

Making a Data Call with a Voice Terminal
Transfer to Data
With this feature, a multiline voice terminal user can originate or answer a call, then establish
a data connection by transferring the call to a data terminal.
A voice terminal must have a DATA feature button (Transfer to Data) to use this feature.
The DATA button is associated with the Data Dial Code (DDC) of a specific digital data
endpoint. A separate DATA button must be provided for each data terminal that a voice
terminal can transfer calls to.
Making a Data Call With a Voice Terminal
Turn on your data terminal.
1
2 Lift the handset and listen for dial tone.
3 If your data call is an outside call, press
Dial the data number.
4
Listen for a high-pitched answer tone.
5
Press
6
Hang up.
7
The following message is displayed on the screen:
within 15 seconds of hearing answer tone.
[DATA]
CONNECTED, SPEED = xxx
.
[DATA]
Making a Data Call with a Voice Terminal 4 - 5