30
ISDN TA/V
6.3 Specifying the Communications Format to be Used
The communications format used between your PC and the ISDN TA/V’s
DTE interface is configured in the communication-software program’s setup
options, and should initially be set to 8 data bits, no parity with 1 stop bit,
often referred to as 8N1. Note that a PC or terminal connected to the
CONTROL
port must be configured to use 8N1 as the communications
format, running at 9600 bps.
6.4 Specifying the Terminal Emulation to be Used
Terminal emulation is the term given when a computer emulates the terminal
type required by the remote computer with which it is exchanging data.
Providing that you have been notified of the terminal type that the remote
computer expects to be connected to, this can be specified in the
set-up options of your communication-software package.
6.5 Specifying the Command Language of Your ISDN TA/V
The command language used to issue instructions to your ISDN TA/V (such
as dial a number, or answer a call) is compatible with the industry-standard
AT commands, and can be typed directly at your computer’s keyboard (in
asynchronous mode), or indirectly via the menu structure of your
communication-software package.
Unfortunately we have to generalise at this point because you could be using
one of a great many communication-software packages to interact with your
ISDN TA/V. However, in order for your software to be able to instruct the
unit to dial, etc, it will need to be informed of the type of command language
used by the ISDN TA/V.
By selecting from the menu options available (refer to your communication-
software guide for details):
• Specify that the command language to be used is
AT
or
HAYES
compatible.
• Specify that the command required to initiate dialling is
ATD
.
• Specify that the command to answer an incoming call is
ATA
.
• Specify that the command used to hang-up a call is
+++
(three plus signs)
followed by
ATH
.
