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ISDN TA/V
11.3 Using AT Commands
Entering AT command sequences, via the DTE interface or CONTROL port,
from any asynchronous computer or terminal keyboard provides greatest
flexibility when commanding the ISDN TA/V. This method of control also
requires the greatest level of knowledge in that it is like using any language—
if you only think that you know how to say whatever you want to say, you are
likely to get it wrong and will be misunderstood.
The remaining sections of this chapter outline the do’s and don’ts of the AT
command language, and should give you the confidence to go on and use the
command language to optimise the performance of your TA/V.
11.4 AT Command Rules
AT commands can be entered from any asynchronous computer or terminal
attached to the ISDN TA/V’s DTE interface, providing it is communicating
with the DTE interface, is in terminal mode, and the DTE interface is
configured to accept asynchronous commands. Alternatively, AT commands
can be entered from any asynchronous computer or VT100 terminal attached
to the ISDN TA/V’s
CONTROL
port.
In practice, if you have followed the installation instructions detailed in Part I
of this manual, your computer will be connected to the ISDN TA/V’s DTE
interface, and running a communications-software package. All programs of
this type offer terminal mode as a menu option, and therefore enable AT
command access to your ISDN TA/V.
In order to use the AT command language successfully you must follow
certain rules, as outlined here:
