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Chapter 6: Installing and Configuring Software in your Computer
Generally when using the ISDN TA/V you need to know very little about
the unit itself, since its control is governed by the communication software
installed in your computer. This software is not included with the purchase of
the ISDN TA/V, therefore for details of how to install and use these programs
you must refer to their dedicated user guides. There are, however, a limited
number of settings which reflect the requirements of your ISDN TA/V that
have to be configured into the communication software. These are outlined
in this chapter.
6.1 Selecting the Flow-Control Type
Flow control is the system by which the computer or ISDN TA/V is instructed
to stop sending data if the processing buffers of the connected device are full,
and to recommence sending once the buffers reach a low level. In all
applications of computer-to-ISDN TA/V communications, the flow-control
system used should be of the type RTS/CTS (otherwise known as hardware
flow control) which should be specified within the communication software
configuration.
Hardware flow control is recommended over software flow control because it
allows fully transparent passage of data through the ISDN TA/V, in that the
TA/V’s flow control does not interfere with any data or protocols used by the
attached computer equipment.
6.2 Setting the Data Rate (Data Transfer Speed)
The ISDN interface is transparent to whatever data rate is configured into the
communication software. However, the unit offers the best throughput of
data between its DTE interface and the attached computer when it is running
at the highest available speed. For this reason your computer’s serial port
should be set to operate at its fastest speed, but not exceeding 115,200 bps
which is the highest acceptable speed of your ISDN TA/V’s DTE interface.
Note: A lower data rate can be used, and this will be recognised by your ISDN
TA/V.
6. Installing and Configuring
Communication Software
in Your Computer
