RC224ATL View Datasheet(PDF) - Conexant Systems
Part Name
Description
MFG CO.
'RC224ATL' PDF : 104 Pages View PDF
4
4.0 AT Commands
Each command line must start with the AT prefix and be terminated with a
carriage return (CR). Several commands may be included on one command line.
A command line may contain up to 40 characters, excluding the AT prefix and the
terminating CR. A separator is not required between data commands. A
semicolon (;) separator is required between fax commands.
AT commands are composed of 10-bit ASCII encoded asynchronous
characters. The character format in data mode is 8 data bits with no parity, or 7
data bits with even, odd, or no (two stop bits) parity, at a data rate of 19,200, 2400,
1200, or 300 bps. The character format in fax mode is 8 data bits with no parity at
19,200 bps.
Table 4-1 lists result codes and messages. Table 4-2 summarizes the AT
command set. Table 4-3 summarizes the fax command set.
Table 4-1. Result Codes and Messages
Digital Code
Word Code
Meaning
0
OK
Command line executed without errors
1
CONNECT
Connection at 300 bps
2
RING
Ringing signal detected
3
NO CARRIER
Carrier lost or never present
4
ERROR
Invalid command, checksum, error in
command line, or command line exceeds 40
characters
5
CONNECT 1200
Connection at 1200 bps
6
NO DIALTONE
No dial tone detected
7
BUSY
Busy signal detected
8
NO ANSWER
No silence detected when dialing a system not
providing a dial tone
10
CONNECT 2400
Connection at 2400 bps
+F4
+FCERROR
Fax carrier error
13
DATA
Connected as data modem during auto answer
15
FAX
Connected as fax modem during auto answer
D224ATLVDSC
Conexant
4-1
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