21
Response Sets
When you send a command to your CheetahModem, it sends a response to
your computer. For example, if you type
AT[Enter]
, the CheetahModem
should respond with
OK
. The CheetahModem gives out different responses
for the different tasks that it performs. Communication software use these
responses to control the flow of the program. The responses that are
intercepted by the communication program are normally not displayed on
your computer screen. This section describes the CheetahModem
responses returned by the CheetahModem when you communicate directly
with the CheetahModem.
There are five X response sets: 0, 1, 2, 3 and 4. They define certain dialing
characteristics and how the CheetahModem handles dial tones and busy
signals, as described in the following sections. The response classifications
are designed to meet the requirements for various types of operation and
application. You can select an X response set by using the Xn command.
Aside from the X response sets, extended responses are also available that
shows the carrier speed, compression method and the error-correction
protocol as described in the following table. You can enable the extended
responses by using the Wn command.
CheetahModem responses can appear as words or numbers. Your
CheetahModem is set up to return word responses. Word responses are
followed by a carriage return and line feed. If your CheetahModem is
operating under an application that handles character strings inefficiently or
cannot handle them at all, you can use the V0 command to switch to
numeric CheetahModem responses. Numeric responses are followed by a
carriage return only.
If you do not want to receive CheetahModem responses at all, you can use
Q1
command to disable them.
The following table lists and describes the available response codes; where
x means that result word/code is available:
WORD CODE n Value in ATXn Command
0 1 2 3 4
OK 00 x x x x x
CONNECT 01 x x x x x
RING 02 x x x x x
NO CARRIER 03 x x x x x
ERROR 04 x x x x x
CONNECT 1200 05 x x x x
NO DIALTONE 06 x x x
BUSY 07 x x
NO ANSWER 08 x x x x x
CONNECT 600 09 x x x x
CONNECT 2400 10 x x x x
