1-1
Issue 2 May 1995
Introduction
1
Welcome to the World of
Portable, High-Speed Data
Communications!
Congratulations on your purchase of an AT&T KeepInTouch
t
PCMCIA modem (Models 3765 and 3766). The KeepInTouch
PCMCIA modem is a credit card size modem that combines
high-speed V.34 data communications with send-and-receive fax
capability. The modem fits into any notebook or laptop personal
computer that has a PCMCIA Type II socket and allows you to
keep in touch with your home or office from anywhere in the
United States and Canada.
The KeepInTouch PCMCIA high-speed modem can transmit and
receive information over a standard telephone line at 28,800 bits
per second. It is compatible with a variety of modem standards,
allowing it to communicate with slower modems. To ensure
error-free data transfers, the KeepInTouch PCMCIA modem
employs V.42 and MNP
r
Levels 4–2 error control. To increase
effective data throughput and reduce the duration of calls, the
modem supports both V.42bis and MNP5 data compression
standards to achieve peak transmission rates up to 200,000 bps.
For fax operation, the modem supports both Class 1 and
Class 2 fax standards. Class 1 fax places most of the
processing burden on the software while Class 2 fax places it on
the modem. In addition, the modem also supports the CCITT
V.17 fax protocol which allows fax transfers to occur over
standard telephone lines at 14,400 bps. To take advantage of
the 14,400 bps data rate, you must connect to a fax machine or
fax modem that also supports the V.17 protocol.
