Owner's manual

AT Commands for CX930xx Modem Reference Manual
3-68 Conexant 102752B
The third case is where a break is received from a remote
modem during a non-error corrected connection:
0 Clears data buffers and sends break to the DTE.
1 Clears data buffers and sends break to the DTE.
(Same as 0.)
2 Send a break immediately to DTE.
3 Send a break immediately to DTE. (Same as 2.)
4 Send a break in sequence with received data to
DTE.
5 Send a break in sequence with received data to
DTE. (Same as 4.) (Default.)
Result Codes
OK 0 to 5.
ERROR Otherwise.