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3.4 Making a Call
When you have successfully followed the start-up procedure in Section 3.1,
the modem should be ready to make a call. (This section assumes the
default values for all commands and S-registers.)
3.4.1 Dialling
To dial a number from your terminal, type
ATD
followed directly by the
number you want to dial, then press
RETURN
. For example, to dial 0123
456789 type ATD0123456789 <CR> .
If you are connected to a PBX line, the number for an outside line (for
example 9), must be inserted immediately before the number you want to
dial. On some older PBXs you may need to insert a comma after the
number for an outside line, to cause a delay before the modem continues
dialling, for example
ATD9,0123456789 <CR> .
3.4.2 Call Progress
The standalone modem includes a loudspeaker to enable you to monitor the
progress of the connection. You will hear dial tone, followed by silence. If a
modem answers the call, it will send answer tone (a continuous whistle).
Once a connection is established, the speaker is automatically muted.
If the call is unsuccessful, you will hear the engaged or unobtainable tone,
or the call being answered by a person speaking.
During the progress of the connection, various messages may appear on the
screen:
RINGING
while the ringing tone can be detected from the remote
end.
CONNECT after successful connection to the number you are
calling.
If there are problems, the following messages may appear:
DIALTONE
if the modem detects dial tone when it is not expected.
The modem then disconnects the call.
NO DIALTONE if dial tone is not detected when the modem goes on
line.
X460-306851 Issue 1 3-5 Rev.0