Originating a Call
If the D - Dial Command command is issued
with the desired phone number, several possible result codes can be returned.
The following chart lists the result codes:
Result Code Meaning
NO CARRIER Connection failed
NO ANSWER No response to @ dial modifier
NO DIALTONE No dial tone in X4 mode
NO ____ Connection failed for some other reason
BUSY Busy signal detected
CONNECT ____ Connection successful; you may need to change DTE speed to the
indicated baud rate. (See Wn)
CARRIER ____ DCE carrier speed. (See Wn)
PROTOCOL: ____ Error-correction protocol being used by the modems.
(See Wn and S95)
COMPRESSION:____ Compression technique in use by modems. (See Wn
and S95)
AUTOSTREAM Autostream technique in use by modems if selected by user.
(See Wn and S95)
Ignore other responses, but continue to wait for CONNECT ___, BUSY, or NO
___ responses. The CARRIER and PROTOCOL result codes are intermediate result
codes and precede either a CONNECT ____ or NO ____ result code. These result
codes are only returned by Vseries modems when configured to use an error-correcting
protocol.
If you recognize any numeric value for the baud rate after the CONNECT result
code, you have a more robust controller. Use the PROTOCOL result code to
determine if the flow control requested by the &Kn -
Select Flow Control Option command is in effect for Vseries products.
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