The toll prefix list contains a list of local number that have the same area code as the location from which you are dialing, but that require you to dial the area code. You can modify the toll prefix list that is used for a particular dialing location.

To modify the toll prefix list for a dialing location, follow these steps:

1.	Click the Start button, point to Programs, point to Accessories, point to Communications, and then click Phone Dialer. NOTE: If Phone Dialer is not installed, you can install it from the Windows Setup tab in the Add/Remove Programs tool in Control Panel.
2.	In the Number To Dial box, type a 7-digit phone number with the same first three digits as the phone number you want to add to the toll prefix list. For example, if you want to add all numbers beginning with 555 to the toll prefix list, type a number that begins with 555. If you are using Windows 98, click Tools, click Dialing Properties, and then click Area Code Rules. To add a "1" to an area code, click New in the "Dial 1 for the numbers with the following prefixes" box, type the new area code, and then click OK. To prevent a 1 from being dialed, click New in the "Do not dial 1 for numbers with the following area codes" box, type the new area code, and then click OK. After you perform these steps, do not perform the remaining steps in this article.
3.	On the Tools menu, click Dialing Properties.
4.	In the I Am Dialing From box, click the dialing location whose toll prefix list you want to modify.
5.	Click the Dial As Long Distance Call check box to select it, and then click OK.

When you perform this procedure, the entry for the dialing location you select is modified in the Telephon.ini file. The [Locations] section of the Telephon.ini file contains an entry for each dialing location you have created. The entry for the default dialing location is similar to:

   Location0=0,"Default Location","9","9","425",1,0,0,1,"",0,""
				

If you add numbers that start with 555 and 666 to the toll prefix list for the default dialing location, the entry in the Telephon.ini file appears similar to:

   Location0=0,"Default Location","9","9","425",1,0,0,1,"555,666",0,""
				

The prefixes are separated by commas, with no preceding or trailing spaces.