Multitech MT5634HD16 User Manual page 27

3 AT Commands
Xn Result Codes and Call Progress Selection
n = 0, 1, 2, 3, 4, 5, 6, or 7
Default: X4
The X command selects which result codes the modem provides in command mode and whether the
modem uses "smart dialing" or "blind dialing". When it smart dials, the modem listens for dial tones and
busy signals and responds to them. When it blind dials, the modem ignores the signals and relies on
timing instead.
X0 causes the modem to blind dial. Instead of looking for a dial tone, it pauses for the time set in register
S6 and then dials regardless. Once a connection has been made, it sends the Bell 103 basic code
CONNECT to the terminal. It ignores any busy signals.
X1 causes the modem to blind dial, but in addition to the basic CONNECT code it provides extended
codes consisting of the word CONNECT and the speed of the connection ( CONNECT 14400 or
CONNECT 28800 , for example). In this mode, the modem does not recognize or respond to dial tones
or busy signals.
X2 causes the modem to wait for a dial tone before dialing. If it does not detect a dial tone within the time
set by S6, the modem sends a NO DIALTONE result code to the terminal. In this mode, the modem pro-
vides extended result codes, but does not respond to busy signals.
X3 causes the modem to blind dial, but also it looks for a busy signal, and if it detects one, it sends a BUSY
result code to the terminal. In this mode, the modem provides extended result codes, but it does not
respond to dial tones.
X4 causes the modem to look for a dial tone and a busy signal, and respond with NO DIALTONE or
BUSY , as appropriate. It also provides extended result codes. It is the most useful setting for most data
communication programs, and is the default setting.
X5 causes the modem to look for a dial tone and a busy signal, and response with NO DIALTONE or
BUSY , as appropriate. It also provides extended result codes. It is the most useful setting for most data
communication programs, and is the default setting.
X6 causes the modem to look for a dial tone and a busy signal, and respond with NO DIALTONE or
BUSY , as appropriate. It also provides extended result codes. It is the most useful setting for most data
communication programs, and is the default setting.
X7 causes the modem to wait for a dial tone before dialing. If it does not detect a dial tone within the time
set by S6, the modem sends only the basic result code to the terminal ( ERROR , NO CARRIER , or
CONNECT , for example). In this mode, the modem does not respond to busy signals.
CommPlete Communications Server 21