Motorola V.3400 User Manual page 54

AT Commands
Command
X
X1
X2
X3
X4
* default
The X command followed by a dial command causes the modem to go
off hook, wait the amount of time set in register S6, and dial the number.
If connection is made the modem returns a CONNECT (code 1)
message to the screen regardless of the speed of connection. With a
basic response, the modem will not detect a busy or no dial tone condi-
tion.
The X1 command followed by a dial command causes the modem to go
off hook, wait the amount of time set in register S6, and dial the number.
If connection is made the modem returns a appropriate CONNECT
message or code to the screen. The modem will not detect a busy or no
dial tone situation.
The X2 command followed by a dial command causes the modem to go
off hook and wait for a dial tone before dialing. If a dial tone is not
detected within 5 seconds, the modem sends a NO DIALTONE message
and hangs up. The modem will not detect a busy situation in this mode.
The X3 command followed by a dial command causes the modem to go
off hook, wait the amount of time set in register S6 and dial the number.
If a busy signal is detected, the modem sends a BUSY message and
5-8
Dial tone and busy signal detection not selected; CON-
NECT (code 1) response messages displayed for all
speeds
Dial tone and busy signal detection not selected; appro-
priate CONNECT response messages or codes displayed
for data rate
Dial tone detection only; NO DIAL TONE message or
code appears if dial tone not detected within 5 sec
Busy signal detection only; BUSY message or code
appears if dialed number is busy
Dial tone and busy signal detection; appropriate CON-
NECT message or code displayed *
Operation
V.3400