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Programming Interface
Page 15
4
4
Selects Bell 103 when modem is at 300 bits/s
B2
Selects V.23 originate mode receive 1200 bits/s, transmit 75
bits/s;
Answer mode receive 75 bits/s, transmit 1200 bits/s
B3
Selects V.23 originate mode receive 75 bits/s, transmit 1200
bits/s;
answer mode receive 1200 bits/s, transmit 75 bits/s
B15
Selects CCITT V.21 when the modem is at 300 bits/s
B16
Selects Bell 103 when the modem is a 300 bits/s
B30
Selects V.22bis when the modem is at 4800 bits/s
B41
Selects V.32 full duplex when the modem is at 4800 bits/s
B52
Selects V.32bis full duplex when the modem is at 7200 bits/s
B60
Selects V.32 full duplex when the modem is at 9600 bits/s
B70
Selects V.32bis full duplex when the modem is at 12000 bits/s
B75
Selects V.32bis full duplex when the modem is at 14400 bits/s
Result Codes:
OK
n=0, 1, 2, 3, 15, 16, 30, 41, 52, 60, 70, 75.
Error
Otherwise.
Cn
Carrier Control Option (dummy command)
This command is used by some modems to control the transmit carrier. This chip set
does not support C0 and will respond in error if this command is given. This chip set
will accept C1 without error in order to ensure backward compatibility with
communications software that issues this command.
C0
Transmit carrier always off (returns ERROR).
C1
Normal transmit carrier switching.
Result Codes:
OK
n=1.
Error
Otherwise.
Dn Dial
Command
This command begins the dialing sequence. The string n (modifiers and telephone
number) is entered after the D command.