Owner`s manual

28 MultiMobile
Chapter 3—Application Program Interfaces (APIs)
Making ISDN Data Calls
The dialing method usually is subject to the application programs you
use. For example, Telix uses the AT command for making calls; Microsoft
Exchange and Internet Explorer use Windows 95 Dial-Up Networking
(DUN) for dialing.
Users can use ISDN AT command ATD<ISDN_phone_number>, such as
ATD5551000 or ATDT5551000, or DUN to make ISDN calls in VCOMM
mode. See making Multi-Link PPP connections through VCOMM API.
Using ISDN AT Commands to Establish Multi-Link
PPP Connections
There are three ways to make Multi-Link PPP calls with ISDN AT
commands. The following methods must be done in async-to-sync PPP
conversion mode (AT!Z=9).
Method 1:
AT!Z=9 Sets async-to-sync PPP conversion mode
AT&N0=1 Sets Multi-Link mode
AT&Z0=<ISDN_phone_number> Sets secondary dialed ISDN phone #
For example: AT!Z=9&N0=1&Z0=5553000
ATD5551000
When you make an ISDN call (5551000), the PC Card makes the second
call for you automatically through the pre-stored secondary ISDN phone
number in AT&Z0 (5553000) and bundles the two calls for data transfer.
Method 2:
AT!Z=9 Sets async-to-sync PPP conversion mode
AT&N0=1 Sets Multi-Link mode
AT&J1 Uses single ISDN phone number for Multi-Link PPP connections
For example: AT!Z=9&N0=1&J1
ATD5551000
If AT&J1 is set and users dial one number with the dial string (5551000),
the PC Card automatically dials that number twice and bundles the two
calls for data transfer. If there is a pre-stored ISDN phone number in
AT&Z0, it is overwritten automatically by the ISDN phone number
(5551000).