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Compression
The I-modem supports the leading de-facto standards for compression
over ISDN: Stac LZS, Microsoft, and Ascend.
Multilink PPP (MP-PPP)
Multilink PPP support enables the I-modem to use both of the available
B-channels simultaneously. The I-modem uses PPP/MP-PPP spoofing to
mediate between applications running on your computer, which may not
be aware of MP-PPP, and host computers that support MP-PPP. In effect,
the I-modem tricks both ends of the connection, keeping them happy
communicating the way they're accustomed, while maximizing
throughput.
Universal Connect
When the I-modem is set to Universal Connect, it autosenses V.120, V.110,
or analog fax/modem connections. Use Universal Connect when calling
ISDN or analog Bulletin Board Systems (BBSs), for example. For details,
see Chapter 11, Handshaking, Error Control, Data Compression, and
Throughput, in the I-modem Command Reference manual.
V.110 Connections
V.120 and V.110 are standards for passing asynchronous data over ISDN
B-channels, which are inherently synchronous. To make a connection
using V.120 or V.110, the device at the other end of the connection must
also support V.120 or V.110. A typical application of V.120 is for BBSs.
Modem and Fax Calls
The I-modem emulates an analog fax/modem, allowing you to connect to
remote analog modems and fax machines.
Clear-Channel Synchronous Connections
When you set the I-modem to make clear-channel synchronous
connections, it sets up a 64 Kbps connection with a remote device,
enabling you to exchange any kind of synchronous data. Common
applications of clear-channel synchronous are videoconferencing and
remote access to mini- or mainframe computers.
The I-modem and ISDN
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