accepted, but then rejected if issued to a line
not associated with an installed Autocall
Adapter.
2. By the common controls if an associated line is
issued the Break or Search command. The
Break or Search is not executed, but is ended
immediately.
This sense bit is never set for the Read,Write, Poll, Prepare, Wrap, Enable, Disable, Inhibit, or
Sense commands.
1-Bit--Intervention Required
If a Read, Inhibit;Poll; Write, or Prepare command
is being executed and the addressed line has a data
line set attached, this bit will be set:
1. If the data set has power off.
2. If the data set is not attached to the 2703.
3. If the data set is either"on-hook" or not in
data mode.
4. If the addressed line has a telegraph line
adapter that has not been enabled.
5. For the Read, Inhibit, and Poll commands
only, if a continuous Space signal is received
for one character time or greater.
6.While Dial is being executed, if the ACU (Automatic Calling Unit) Power Indicator is OFF. 7. Also if the ACU is not connected to the 2703.
This bit is never set under theWrap, Enable,
Disable, and Sense commands.
4-Bit--Data Check
This bit is set:
1. During execution of the Read and Inhibit
commands if the line is in text-out mode and
a® (negative reply) is received; it indicates
that the remote terminal reGeived data with
incorrect parity or LRC.
2. For the Read, Inhibit, andPoll commands if
the line is at Space at stop-bit time (2703 is
out of sync).
3.When the line is executing Write, Poll, or Wrap if a VRC error is detected in one of the
characters being transmitted.
4. If the line is equipped with the telegraph line
adapter and an echochp-ck occurs.
5. During Read, Inhibit, orPoll when a VRC or
LRC error is detected.
6. If the response to aPoll command is not @ or ®. This sense bit is not set during the execution of
Dial,Prepare, Enable, Disable, or Sense.
32
7 -Bit--Timeout
This sense bit is set:
1. During the execution of the Read command if
no characters are received for a continuous
period of three seconds while the line is in
control mode. For text-mode operation, a
28-second timeout applies.
2. During the execution of Dial, if theACU's ACR (Abandon Call and Retry) line turns ON. This indicates that the call was not established
in the allotted period of time and should be
redialed.
3. During aPoll command if no characters are
received for a continuous period of three
seconds when the receive-control bit isON. 4. During the execution of a Prepare command if
a continuous Space signal has been received
for more than 28 seconds.
5. During the execution of Disable if a switched
network data set does not go"off-hook" or "on hook" within 28 seconds after being signaled to
do so. That is, DataSet Ready does not turn OFF and end the Disable command within 28
seconds of the time that Data Terminal Ready
turnedOFF. This sense bit is not set during execution of Write, Wrap, Break, Enable, or Sense.
IBM Terminal Control Type II
O-Bit--Command Reject
This bit is set during initial selection:
1. By the interface controls if a command that is
not defined or cannot be executed by the 2703
is presented. This occurs if the Dial command
is issued and the Autocall Adapter is not
installed in the 2703. The Dial command is
accepted but then rejected when issued to a line
not associated with an installed Autocall
Adapter.
2. By the common controls if an associated line
has been issued the Break or Search command.
The Break or Search is not executed but is
ended immediately.
This sense bit is never set for the Read,Write Poll, Prepare, Wrap, Enable, Disable, Inhibit,
or Sense commands.
1-Bit--Intervention Required
This bit is set when a Read, Inhibit,Poll, Write, or Prepare command is being executed and the addressed
line has a data line set attached:I
not associated with an installed Autocall
Adapter.
2. By the common controls if an associated line is
issued the Break or Search command. The
Break or Search is not executed, but is ended
immediately.
This sense bit is never set for the Read,
Sense commands.
1-Bit--Intervention Required
If a Read, Inhibit;
is being executed and the addressed line has a data
line set attached, this bit will be set:
1. If the data set has power off.
2. If the data set is not attached to the 2703.
3. If the data set is either
data mode.
4. If the addressed line has a telegraph line
adapter that has not been enabled.
5. For the Read, Inhibit, and Poll commands
only, if a continuous Space signal is received
for one character time or greater.
6.
This bit is never set under the
Disable, and Sense commands.
4-Bit--Data Check
This bit is set:
1. During execution of the Read and Inhibit
commands if the line is in text-out mode and
a
that the remote terminal reGeived data with
incorrect parity or LRC.
2. For the Read, Inhibit, and
the line is at Space at stop-bit time (2703 is
out of sync).
3.
characters being transmitted.
4. If the line is equipped with the telegraph line
adapter and an echo
5. During Read, Inhibit, or
LRC error is detected.
6. If the response to a
Dial,
32
7 -Bit--Timeout
This sense bit is set:
1. During the execution of the Read command if
no characters are received for a continuous
period of three seconds while the line is in
control mode. For text-mode operation, a
28-second timeout applies.
2. During the execution of Dial, if the
in the allotted period of time and should be
redialed.
3. During a
received for a continuous period of three
seconds when the receive-control bit is
a continuous Space signal has been received
for more than 28 seconds.
5. During the execution of Disable if a switched
network data set does not go
do so. That is, Data
seconds of the time that Data Terminal Ready
turned
IBM Terminal Control Type II
O-Bit--Command Reject
This bit is set during initial selection:
1. By the interface controls if a command that is
not defined or cannot be executed by the 2703
is presented. This occurs if the Dial command
is issued and the Autocall Adapter is not
installed in the 2703. The Dial command is
accepted but then rejected when issued to a line
not associated with an installed Autocall
Adapter.
2. By the common controls if an associated line
has been issued the Break or Search command.
The Break or Search is not executed but is
ended immediately.
This sense bit is never set for the Read,
or Sense commands.
1-Bit--Intervention Required
This bit is set when a Read, Inhibit,
line has a data line set attached: