34
ISDN TA/V
Alternatively, you can initiate a disconnection by typing an ISDN TA/V
command sequence (detailed in the Reference section), or by selecting the
disconnect option from the menu of your local communication software.
Refer to your communication software manual for details of how to
disconnect a call in this way.
Caution
Remember that if you have dialed the call you will normally be billed for
it. Always ensure that your own ISDN TA/V has disconnected properly.
7.7 Receiving Incoming Calls
As a default, your ISDN TA/V has been configured to answer incoming data
calls automatically, as long as DTR has been raised on the DTE interface
(your communication software program is running on the PC). This can be
altered using AT commands, detailed in the Reference section.
On receipt of an incoming data call, your ISDN TA/V’s front-panel LCD
displays
INCOMING RING
The word
RING
, will be echoed to your computer screen (providing your
computer is running a communication-software program, and is in
communication with the TA/V).
This call can be answered by selecting the appropriate menu option within
your communication software. Refer to your communication-software manual
for details of how to do this.
When your ISDN TA/V is instructed to answer the call, it sends an answer
tone to the remote unit, and displays
ANSWERING
on the front-panel LCD. Rate adaption, error correction and data-
compression negotiations take place between the two units, the results of
which are reported back to your computer screen (and on the unit’s LCD).
For example
CONNECT 64000/LAPM
indicates a line speed of 64000 bps using LAPM (V.42) error correction.
