ZyXEL Communications Omni TA128 - Manual (Page 29)

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4
ISDN Communication
Basics
In this chapter, we will cover how to initiate and receive calls over
digital lines using your TA128.
Understanding AT Commands
AT commands are used to configure and control the TA128.
Command statements are usually sent to the TA by being typed
from the computer keyboard.
Command statements must be written in a specific form in order
for the TA128 to recognize them. A command statement begins
with the letters “AT” or “at”. It is then followed by one or more
commands and then by <Enter>.
AT commands can only be issued when the TA128 is in
“command” or “off-line” mode.
Once the TA128 has established a connection with the remote
device, it goes into “on-line” mode, and the characters sent from
your computer (through the TA128) are transmitted to the remote
device.
In order to issue an AT command statement, you first need to run
your communications software and configure it to the port
connected to the TA128. Refer to your communications software
manual if this is not the case.
Once the communication terminal program is running and the
TA128 is connected:
Type:
AT<Enter>