Modem Initialization Strings - Watchguard Firebox X1000 Reference Manual

Modem Initialization Strings

These parameters specify a chat session that occurs between the Firebox
and the modem to properly initialize the modem. In most cases the
default initializations work with a wide variety of modems. The default
initializations are known to work with the list of approved modems.
In the default initializations below, the parameters marked with ^ specify
what the Firebox should expect back from the modem, while the portions
marked with _____ specify what the Firebox sends to the modem:
Explanation of fields
1
2
3
4
5
6
Reference Guide
xonxoff
Uses software flow control (that is, XON/XOFF) to control the
flow of data on the serial port.
"" +\p+\p+\d\r\pATH "" \dAT&F OK ATE0 OK ATS0=1 OK
^^ ________________ ^^ ______ ^^ ____ ^^ ______ ^^
1 2
Specifies that the Firebox should expect nothing back from the
modem at this point in the chat.
Specifies that three plus characters (+++) should be sent with short
pauses in between, then a 1-second delay, then a return character, a
short pause, then the characters "ATH" are sent, finally followed by a
carriage return (which is not shown, but implied). This sequence
commands most modems to hang up.
Specifies that the Firebox should expect nothing back from the
modem at this point in the chat.
Send a 1-second delay followed by the characters "AT&F" to
command the modem to recall its factory-default configuration.
Expect "OK" back from the modem.
Send "ATE0" to the modem, which directs it not to echo back
command characters sent.
Modem Initialization Strings
3 4 5 6 7 8 9
93