As of October, 1990, we haven't heard of any internal 9600 baud modems for the
Macintosh Portable. However, Touchbase Systems just announced an external
portable modem, the WorldPort 9600.
The WorldPort 9600 is a portable V.32, 9.6Kb self-powered modem for laptop
computers. The WorldPort 9600 supports full-duplex synchronous and
asynchronous communications. The 8-ounce modem contains an EIA-232 port for
direct connection to a laptop. It runs under its own 9V battery or via an
optional external AC adapter
The 9600 features Trellis coding, echo cancellation, fallback speeds from 300
bits to 4.8 bits and MNP Class 4 error correction. It supports the Hayes AT
command set and CCITT V.21, V.22, B.22bis, V.23, and Bell 103 and 212A
standards.