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2.11.4
No dialling tone.
# The modem gives a NO DIAL TONE message, disconnects
the line and awaits the next command.
You previously tested the connection between the modem and
the telephone network by lifting the receiver and obtained the
dialling tone. There is now clearly something wrong with the
connection between the modem and the network. If you do not
hear the dialling tone through the loudspeaker, there may be
something wrong with the telephone network itself (overloaded
possibly). It may be that the telephone lead on the rear of the
modem has been reversed.
¢ You hear the dialling tone in the loudspeaker but the
modem had not responded to this and gives the message
NO DIALTONE.
This may occur with certain local switchboards.
=Give the command
prior to calling, set commas «» in the call command where a
pause in the procedure is required.
This will result in the modem waiting for a specific number of
seconds as specified in the S6 register before the first digit is
dialled.
For example:
0,,,4737011710p%|
In this example (with X3) the modem will
p pause several seconds
as determined by the S6 register (standard 2 seconds) before
dialling the first digit. This is to say that the dialling tone is not
registered by the modem but is assumed to be present. The
manufacturers setting is 2 seconds per comma.
(This may be
increased by changing the contents of the S8 register. The
maximum value is 255 seconds per comma).
Read more about the S-registers further on in this book if so
required.
In this command, the modem
lifts the receiver, waits 2 seconds
and then dials 0 to obtain the town line. It then waits 6 seconds
before commencing to dial the number to Semaforum BBS.
2-14
LZ1R104006 R1.00
Zat 14.4/14.4-7 and Zat 19.2/19.2-7
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