7-4 CHAPTER 7: PLACING AND RECEIVING CALLSATD number>An example is as follows:ATD 1 908 555 1212Some Internet service providers may require you to dial twotelephone numbers to place a Multilink PPP call. In this case,the ampersand (&) character is used to dial two telephonenumbers.To automatically dial two telephone numbers, add thefollowing to the dial string of your application software: number 1> & number 2>In this case, you would type, for example:ATD 1 908 555 1212 & 1 908 555 1213Note that if Multilink PPP is disabled (i.e., S 80=0), you canstill place a Multilink PPP call without changing the S 80register value. In the dial string, enter the first telephonenumber, then the ampersand character followed by thesecond telephone number, as shown in the example above.Placing a TollMizer CallThe TollMizer feature (also referred to as Switch 56 Permissiveor Data Over Voice) allows you to place a data call using avoice channel, saving the extra cost of the data channel.Combining TollMizer with 3ComImpact IQ compression, youcan transfer up to 128 Kbps of data for the price of a singlevoice call.TollMizer calls may not work properly if placed via longdistance carriers.You can select this feature from the 3C882 ISDN modem’sConfiguration dialog box. Once enabled, all outgoing ISDNcalls will be TollMizer calls. Note that to place calls to deviceswhich do not support TollMizer, you must disable this feature
