These options are used for applications that use the gateway to make outbound calls.
Dialing Rules
Dialing rules are applies to the phone number to be dialed. If nothing is set, the phone number will be dialed exactly as entered.
Add 1 for 10 digit numbers: automatically add for for long distance number. Some place in the US use 10 digits for local number also.
Remove area code for local calls: automatically remove the area code if it matches the area code in the license. You can find the area code in the gateway main window.
Dial for outside line: automatically insert the dialing prefix for outside line in office environment. This option can also be used for setting dialing prefix like *67 for blocking caller ID.
Hang up
The computer hangs up the call as soon as the modem is disconnected from the line. However, most phone services require a few seconds before the line is cleared for the next phone call. The recommended setting is 10 seconds. But you can experiment with any number larger than 5 seconds.
Call Interval
This is usually used for slow down the phone call. Some unlimited long distance phone services require you not continuously calling with an automatic dialing system.