Boca Systems PRO/6, Руководство по установке

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BOCA PRO16
When operating in synchronous mode, your modem should
always be configured with a locked, non-auto-ranging B setting
(this refers to modem line speed).
For V.34 or V.FC, the B setting only sets the maximum speed.
The modem will automatically determine the highest usable
speed for the line.
Synchronous Mode 1
Your modem is capable of dialing remote systems in
asynchronous mode and then automatically switching to
synchronous mode once connection has been made. If the
connection is lost, your modem will hang up and return to
asynchronous local command state.
The computer required to support synchronous communication
with your modem must be capable of switching between
synchronous and asynchronous modes with the same RS-232
port, as well as controlling the state of the DTR signal under
software supervision.