Maxim Integrated Teridian V.22 bis Linux Softmodem for 73M1822/73M1922 MicroDAA - Manual (Page 8)

V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043
8 Rev. 1.5
A/ Repeat Last Command
The A/ command causes the modem to re-execute the last command or command
sequence that was issued.
A/ and +++AT are the only commands that are neither preceded by AT nor followed by
.
B Communication Standard Selection
 B0
ITU V22bis, V22 or V21 operation
B1 Bell 212A or Bell 103 operation (also V.22bis for 2400 bps operation)
B2 V23 – 75bps transmission, 1200bps reception – Master mode
B3 V23 – 1200bps transmission, 75bps reception – Slave mode
B4 Bell 202 – 1200bps reception
B5 Bell 202 – 1200bps transmission
B6 V23 4-Wire – 1200bps receive and transmit
B7 V23 4-Wire – 1200bps receive and transmit (same as B6)
B8 Bell 202 4-Wire – 1200bps receive and transmit
B9 Bell 202 4-Wire – 1200bps receive and transmit (same as B8)
B10 Selects 1200 bps V.23 Half duplex mode ( V23H). B10 and B11 are the same
B11 Selects 1200 bps V.23 Half duplex mode ( V23H). B10 and B11 are the same.
C Data Carrier Detect Signal (DCD) Monitoring
 C0 DCD always ON
C1 DCD ON in presence of qualified carrier signal
C2 DCD ON in presence of raw carrier signal
During V23 turnaround phases, the DCD signal is OFF if C1 or C2 options selected
V23 Master or Slave
mode
V23 Slave or Master
mode
Turnaround phase
DCD
Active
Inactive