3-10 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWSAdditional configuration may be needed for Multilink PPP. Fordetails refer to S registers 82 and 83 in Appendix B, “ATCommands, S Registers, and Result Codes”.Note that if you disable Multilink PPP (i.e., Register S80=0),you can still place a Multilink PPP call without changing theS 80 register value. In the dial string, enter the first telephonenumber, then the ampersand character followed by thesecond telephone number. For example:ATD 908 555 1212 & 908 555 1213Configuring the B Channel RateSpecify the B channel rate as 56 Kbps, 64 Kbps, or selectTollMizer if you would like to use that feature. TollMizerallows you to place a 56 Kbps data call using a voice channel,which is often less expensive. Note that the device you arecalling must also support TollMizer (sometimes referred to asSwitch 56 Permissive or Data Over Voice) to take advantageof this feature.By default, the B channel rate is 56 Kbps. Check with yourtelephone company for the appropriate B channel rate.To change the connection speed to 64 Kbps or TollMizer, dothe following:1 Select the appropriate radio button (64 Kbps or TollMizer).2 Click the Update button to download the change to your3C882 ISDN modem’s S register.Configuring Voice Call RoutingThe 3C882 ISDN modem allows you to assign a specifictelephone number to a specified analog phone port. Bydefault, telephone number 1 is assigned to phone port one,and telephone number 2 is assigned to phone port two, asshown in Figure 3-10. This is especially helpful should you
