System administration command. Set up or initiate dial-up Internet connections; often used in conjunction with pppd, the PPP daemon. On some systems, chat takes the place of the dip program. A chat script is composed of a simple but expressive syntax of paired expect and send strings and sometimes substrings. A script string may contain either text expected from the modem or text to be sent, a chat directive, a substitution character, or a mixture of all three. When reading from a file, lines beginning with # are treated as comments.
Start script with the ECHO directive turned on.
Allow script to read environment variables by using shell $ VARIABLE syntax.
Read chat script from file instead of standard input.
Send the output of the REPORT directive to file. By default, they are sent to standard error.
Send all error and log information to standard error, even when using the -v option.
Silent mode; send neither error nor log messages to syslogd.
Set the default timeout value to n seconds. When not specified, the default timeout value is 45 seconds.
Set the string to be used instead of the \T substitution character. This is usually a phone number.
Set the string to be used instead of the \U substitution character. This is usually a second phone number.
Verbose mode; log the chat script state and text sent to and received from the modem to syslogd.
Standard error verbose mode; ...