AT&T SYSTEM 25 Manual page 178

Making a Data Call With a Data Terminal
1 Turn on the terminal.
2 Press
The Command Mode menu is displayed.
3
Select
The following prompt is displayed:
4
Enter the number for the data endpoint and press
When the connection is made, the following message is displayed:
NOTE:
pause between dialed numbers. For example:
4-4 Data Terminal Features
and then press
[BREAK]
<Data call> .
DIAL:
CONNECTED, SPEED = xxx
If necessary, use % or , (comma) to add a 1.5-second
9%5550505%%1234%122
.
[RETURN]
[RETURN]
.