FLOW CONTROL
Software XON/XOFF flow control is used.
SUPPORTED COMMANDS FOR VOICE MODE OPERATION
AT+FCLASS=<mode>
This command selects a DCE mode as follows:
<mode> = 0 (Default), Data mode.
<mode> = 2, Fax mode.
<mode> = 8, Voice mode.
Result codes:
OK:
The DCE issues this result code if DCE accepts this command.
ERROR:
The DCE issues this result code if <mode> is not permitted.
AT+FCLASS?
DCE will return current mode setting, followed by the OK result code.
AT+FCLASS=?
DCE will return permitted modes. The response is:
0,2,8
OK
with <CR><LF> between each line.
ATA (with AT+FCLASS=8)
This command causes DCE to answer the phone. DCE will return the VCON result code
immediately.
ATD (with AT+FCLASS=8)
This command causes the DCE to dial a phone number.
Result codes:
VCON:
The DCE issues this result code when the DCE has determined that the
remote station is off hook.
NO CARRIER:
The DCE issues this result code when the DCE has continuously
detected ringbacks for the amount of time specified in S7.
BUSY:
The DCE issues this result code when the DCE detects a busy tone.
RINGING:
The DCE issues this result code when the DCE detects a ringback signal.
