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2-6 Courier I-modem Getting Started Guide
Setting Up Your
I
-modem for ISDN
You can get your ISDN service working by following these five easy steps:
Step One: Subscribe to ISDN service.
Step Two: Your local telephone company will install a BRI line at your
site.
Step Three: Install the I-modem in your computer.
Step Four: Purchase and install an NT-1 (if necessary) and connect the
cables.
Step Five: Run the I-modem Configuration Manager and change a few
settings.
How the
I
-modem Calls a Variety of Devices
When you use the I-modem, all your calls go over one or both ISDN
B-channels. However, you can set the I-modem to make different kinds of
calls over the B-channel:
Internet Access (TurboPPP)
TurboPPP makes the most of your ISDN line in a way that’s transparent
to your computer and the networking applications running on it. You can
use TurboPPP to access the Internet or remote local-area networks (LANs)
at speeds of up to 128 Kbps before compression and up to 512 Kbps with
compression.
TurboPPP is U.S. Robotics’ unique combination of
asynchronous-to-synchronous PPP conversion, compression, multilink
PPP (MP-PPP), and PPP/MP-PPP spoofing.
Asynchronous-to-Synchronous PPP Conversion
Most Internet service providers that allow ISDN connections expect your
data to arrive in synchronous Point-to-Point Protocol (PPP) format. Most
computers, however, can’t deliver synchronous PPP through their serial
ports.
To solve this problem, the I-modem has the ability to convert
asynchronous PPP data to synchronous PPP. This capability allows you
to use networking software that is intended for asynchronous PPP
connections (such as Windows 95 Dial-Up Networking or NetManage
Chameleon) to access the Internet or remote LANs.