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A-10 Configuration Quick Reference
Configuration
Quick-Reference
AT&D2 =Discon The modem hangs up and enters command mode when an on-to-off DTR transition is detected,
while the modem is in data, test, or escape mode. If DTR is low, the modem does not auto
answer.
AT&D3 =Reset The modem hangs up (if connected) and loads the specified option set when an on-to-off DTR
transition occurs. If DTR is low, the modem auto answers.
AT&D4 =Tail This setting is similar to 108.1 except that the modem auto answers an incoming call even if
DTR is off. When DTR transitions from off to on, the modem connects to the telephone line
and dials (if the Default Dial option is enabled).
AT&D5 =108.1 The DTR signal emulates the function of the Talk/Data ( at the Home position) key on the
modem’s front panel. An off-to-on DTR transition instructs the modem to connect to the
telephone line. If the modem detects an incoming ring, it answers the call. If the modem does
not detect an incoming call, the modem dials the number specified by the Default Dial option.
An on-to-off DTR transition disconnects the modem from the telephone line.
AT&D6 =108.2 When the modem is disconnected from the telephone line, and DTR is turned on by the DTE,
the modem responds to all AT commands. When the DTE turns DTR off, the modem does not
respond to dialing and answering AT commands, but responds to all other AT commands. The
DTR signal must remain on throughout the connection. An on-to-off DTR transition
disconnects the modem from the telephone line. If DTE is low, the modem does not auto
answer.
AT & D 7 =108.2/Bsy When the modem is disconnected from the telephone line, and the DTE asserts DTR, the
modem responds to all AT commands. The DTR signal must remain asserted throughout the
connection.
When the DTE de-asserts DTR:
• The modem disconnects from the telephone line. If DTR is de-asserted,
the
modem activates Busyout status.
• The modem does not respond to dialing and answering commands, but responds
to all other commands.
AT&F Reinit Memory?
Reinitialize Memory
Resets the modem to factory default settings. The four factory default option sets are restored
to their original settings, and all stored telephone numbers are deleted.
Enter: AT&F<CR>. The modem displays
326x Initial
and the terminal displays
OK
.
The factory-programmed option sets are now in place.
Guard Tone
Guard Tone
This command determines what type of guard tone the modem uses in V.22bis operation. The
proper guard tone (AT&G) option setting is required by your PTT.
AT & G 0 =Off The modem does not use a guard tone.
AT & G 1 =550 The modem uses a guard tone of 550 Hz.
AT & G 2 =1800 The modem uses a guard tone of 1800 Hz.
AT&I0 Modem ID# 1
Display Modem ID
Software part number.
AT&I1 Modem ID# 1 Factory product code.
AT&I2 Modem ID# 1 Country code
Table A-1.
AT Commands, Cross-Referenced to Front Panel Options (Continued)
AT
Command
Parameter &
Option Description
Gray shading indicates country-specific options. See Appendix C for your country’s options.