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Data Option Definitions
The following descriptions assume single-stream operation which is the case when API is not
being used. Refer to the ISDN Application Programming Interface Programmer's Reference
Manual for more information on single-stream and autostream.
Note that the examples used in this section assume the use of CMD mode.
Answer
Option Values: auto, manual
Applicable Data Protocols: All
Set Answer to auto if you want incoming data calls, or incoming reverse charge calls (X.25 calls)
to be answered automatically. Select manual if you do not want incoming data calls to to be
answered automatically, or if you want to be notified of reverse charging (X.25 calls). If you set
Answer to manual, you can answer data calls manually if your ADM is attached to an
asynchronous data terminal by typing y in response to the prompt ANSWER? or by pressing
on your terminal.
DATA/SEND/OFF
Interactions with DTR: If the DTR option is set to follow and Answer is set to auto, then the
ADM checks to make sure the DTR lead is on (usually indicating that your terminal is turned on)
before automatically answering the call. If you have set the DTR option to ignore and Answer to
auto, the ADM answers data calls whether or not the DTR lead is turned on. If the DTR option
is set to follow and Answer is set to manual, the ADM will not let you manually answer the call
unless DTR is on.
Attention
Option Values: off, 3 of the same ASCII character (default = +++)
Applicable Data Protocols: All
The Attention sequence is used to take the ADM out of the Data Mode enabling you to enter
commands. The default setting is +++.
You must type the sequence rapidly (all three characters within 1.5 seconds).
Before entering the Attention sequence, there must be —at least—a one second delay after typing
your last character. Then the three characters composing the sequence must be typed within 1.5
seconds. Finally, no additional characters should be typed for one second after typing the
Attention sequence. Failure to comply with these guidelines results in the Attention sequence
characters being sent to the far-end as data.
To change the attention sequence to @@@, for example, type set attention @ from an
attached data terminal. Note that you need only type the new character once while changing
the value.
Note:
Possible values include any printable or control characters except
NUL
-
Ctrl
NAK
-
Ctrl
and DC1
Ctrl
, SOH
-
, CAN
@
Ctrl
A
, BS
-
, DC3
U
Ctrl
H
-
.
Q
-
,
Ctrl
X
-
,
Ctrl
S
Data Options and Profiles
4-3
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