52
BOCA PRO16 Reference Guide
SYNCHRONOUS MODES
This section explains the use of your modem in synchronous modes. A
dumb mode or manual mode allows some of the functions of your modem
to be accessed via the front panel switches.
Some of the information in this section assumes you have read the
Getting Started Section.
Your modem offers two synchronous modes, conforming to the Hayes
modem synchronous modes 1 and 2. These modes allow synchronous
communication over two-wire PSTN or leased lines when connected to
asynchronous/synchronous computers or dedicated synchronous ter-
minals.
Synchronous Operation
Your modem supports two synchronous modes. Mode 1 allows opera-
tion with computers which support asynchronous and synchronous
communication on a single RS-232 port. Mode 2 allows your modem to
be operated with dedicated synchronous terminals.
Although your modem can only operate over a single two-wire connec-
tion, it will still perform full-duplex synchronous communication. Half-
duplex operation could be simulated by controlling the state of the RTS
and CTS signals.
Terminal Speeds
Your synchronous terminal or host should use the clock signals pro-
vided by the modem to synchronize transmit and receive data. The clock
speed will represent the actual connection speed of the modem.
FWhen synchronous mode is selected, your modem cannot operate in
constant speed mode or use the error correction or data compression
facilities of the modem. Only variable speed mode is available in
synchronous connections (this refers to the modem’s terminal speed).
Synchronous Modes
Synchronous
Modes
pro16ref.pm6 6/14/96, 2:36 PM52
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