GTE Omni Si Database Technical Practices Manual

							TL-130400-1001Record Code AQ:17.4 Record Code AQ, Figure 17.4, provides a list of parameters
Data Systemapplied to the remote end of a data call. These parameters
Asynchronous Porttemporarily override the pre-existing parameters of the remote
Set/Read Listend of a data call while a data call is connected to/from the port
specified on this record code. This allows the port specified in
this record code to control the configuration of its call partner on
both incoming and outgoing data calls. The remote port may be
reconfigured while the call is set up. It is restored to the original
configuration when the call is disconnected.
This option is normally implemented for host ports; however, any
asynchronous or synchronous (X.25) port can be assigned this
record code. The following rules apply for this record code:
l Any port defined in columns 
12-l 6 of this record code must
have an entry on Record Code CP.
l If the port is asynchronous, it requires an entry on Record
Code AP.
l If the port does not reconfigure the port at the remote end, an
entry on this record code is not needed.
The values assigned to the options defined on this record code
depend on the requirements of the device which is attached to
the port. For parameters that do not need reconfiguration
at call setup, enter a dash in the field.
T---------T---------------------------------------------------------------~---~IIiIIIIIIIIIIII9II
171819101112131416161718191011121314151617181910111213141516171819101112131
10’c-+-+-c-c-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-~L--I1618101~l~l I I I l I I I I I I I I I I I I I I I I I I I  I I I I  I I  I1 f I IL-~-I-~-L-L-I-I-I-~-~-~-~-*-1-1-1-1-~-*-1-~-*-~-*-~-~-*-*-~-~-~-~-~-~-*-*-~ L-2
Figure 17.4Record Code AQ: Data System Asynchronous Port Set/Read List Data
Sheet
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Table 17.4
Entry Fields for Record Code AQCOL.COL.VALID
NO.
NAMEENTRIESCOMMENTS
12PEC0 = PEC number
This field determines the location of the port.
.~.What PEC is this card located in?
13.r GroupA-D = group
Which group (A, B, C, or D) within the PEC is
numberthis card?
14-15Card Slot00-l 0 = slotnumberWhich card slot within the group is this card?
16Circuit NumberO-7 = assignedWhich circuit on the card is being used?
circuit number
17-19Escape fromO-l 27Data TransferAssign the ASCII character that allows a user
Characterto stop the flow of data.
(ASCII Value)-This parameter specifies the character that
will be received to indicate that the terminal
user wants to enter command mode.
0 = escape not allowed
1 = DLE character initiates escape
2-l 27 = decimal representation of selected
ASCII character (see ASCII character set
table )
-This is X.3 parameter 1.
20PAD Echo
0 = no echoEnter 1 if PAD echo is provided.
1 = echo allowed-This field determines the default value of
echo. If this parameter is enabled, then echo
will occur in data transfer mode; otherwise, no
echoing will occur in data transfer mode.
Generally, this field should be set to N for full
duplex and Y for half duplex. If station
equipment displays two of each character, set
this field to N. If station equipment does not
display information that is keyed in, then try
setting this field to Y.
-PAD echo provides for all input characters
to be echoed back to the device attached
during the data transfer mode
-This is applied only to full-duplex devices.
-This is X.3 parameter 2.
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							TL-130400-1001Table 17.4Entry Fields for Record Code AQ (Continued)COMMENTS
device to begin transmission of a packet.
0 = user cannot initate data forwarding
1 = alphanumericcharacters
(A-Z,a-z,O-128 = number4 = characters
ESC,BEL,ENQ, ACK
8 = characters
16 = characters
32 = characters
64 = a character inserted by the user in text
column 0 or 1, which is not any of the
characters listed in O-32 above
Indicate the allowed intervals between the user
input characters.
l-255 = number-This field specifies the default value of the
increments-This timer clocks the time between
characters. If this timer expires, all of the
characters buffered up to that point will be
forwarded in a packet.
-Zero disables this timer.
-If this interval is exceeded, the timeout
causes the forwarding of a data packet.
-The time is selected in 
50-ms increments,
so a selection of 2 = 100 ms.
-This is X.3 parameter 4.
27
Ancillary Device0 = disables flowIndicate whether or not the PAD (Packet
Flow ControlcontrolAssembler Disassembler) can temporarily
1 = enables flowslow the output from this device when the PAD
controlis unable to receive more data.
-This parameter sets the default value of
device flow control.
-If this parameter is marked 
1, the PAD can
flow control the device.
-Flow control is used when the PAD cannot
process data fast enough or when the amount
of characters buffered is too great (due to the
transmission condition or network slow-
down).
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Table 17.4
Entry Fields for Record Code AQ (Continued)COL.COL.VALID
NO.NAMEENTRIESCOMMENTS
27Ancillary Device0 = disables flow-The PAD sends a control-S, signaling the
(cont’d) Flow Control
controldevice to stop transmission to the PAD.
1 = enables flow
Should the device continue to transmit and%.
controloverrun the buffer, data will be lost. When the
PAD becomes unblocked, it transmits a
control-Q. Transmission of this character
continues until the device starts sending data.
. .The PAD then signals the connected device to
continue data flow.
-This field is dependent upon column 35
being set to Y.
-This is X.3 parameter 5.
28-29Break Options 0This field determines the action to be taken by
1an APM when a user depresses the break key
2at the device attached to the APM.
80 = nothing
;i1 = send an interrupt packet (X.25 special
packet) to the PAD
2= send a reset packet (X.25 special packet);
this can cause data to be lost.
8 = escape from data transfer mode
21 = send an interrupt packet (X.25 special
packet) plus indication of the break message
to the PAD; also discard the output to the user
U-E)-This is X.3 parameter 7.
30-31PaddingO-31 = number ofAssign the amount of padding characters,
Characters After charactersinserted after a carriage return is depressed.
Carriage Return inserted-Printing devices need sufficient time for the
mechanism to perform the carriage return.
-This parameter sets the number of null
characters to wait before continuing to send
any other characters.
NOTE: There are no real characters sent.
The 
APMSPM waits the amount of time it
would take to transmit those characters.
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Table 17.4Entry Fields for Record Code AQ (Continued)
COL.VALID
NAMEENTRIESCOMMENTS
32-34Line Width
0 = functionAssign the the number of output characters to
performedbe printed per line at the user device.
.=.automatically-This parameter sets the default value of line
l-255 = number
. . .folding. This determines the number of
of characters percharacters to transmit before an automatic
linecarriage return/line feed is sent. This causes
long lines to fold or wrap to the next line. If
. ._this field is set at 0, this function is disabled.
A backspace will cause the internal counter to
be decremented by one for each backspace
character received, and carriage return will
reset the counter. This field is normally set to
0 because most station equipment does this
automatically. Otherwise, standard line
lengths are 80 or 132 characters.
-This is X.3 parameter 10.
35Pad Flow
Control0 = PAD flowIf selected, this field determines that the APM
control not allowedwill send a signal when the device attached to
1 = PAD flow
it is temporarily unable to receive more data.
control allowed-This field sets the default value of flow
control.
-If this field is marked 
1, the device and/or
user of the device can flow control the PAD.
This disallows transmission of control-S and
control-Q.
-If this field is marked 0, the device cannot
flow control the PAD. However, the device
can transmit flow control characters through
the network.
-Control-S stops the PAD and control-Q
ends flow control.
This is commonly done by printers and users
that get behind and need to catch up.
-This is X.3 parameter 12.
36Line Feed After 0This option allows automatic insertion of a line
Carriage Return 1feed after any carriage return is transmitted.
(CR)4-This parameter sets the default LF (Line5Feed) insertion. This causes the PAD to insert
6an LF character into the transmission stream.
or0 = no line feed inserted
7 = number1 = insert line feed after each carriage return
sent to the user terminal (DTE) as data
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							TL-130400-1001Table 17.4Entry Fields for Record Code AQ (Continued)COMMENTS
5= combination of (1) and (4)
6= insert line feed after each carriage return
sent from the user terminal as data, plus to the
user terminal as an echo
7= combination of (1) and (6)
-This field will usually be set to 0 or 1. If the
user’s terminal is double spacing lines, this
field should be changed to 0. If the user’s
terminal is overprintinglines, this field should
-This parameter sets thedefault value
ofline
feed padding. It is the amount of null
characters after a line feed is sent to a device
that the switch will pause before sending
additional data. Normally, the carriage return
padding field is put in first. If terminals are still
losing information at the beginning of each
line, the value in this field is increased.
-This is X.3 parameter 14.
39Line Editing0or
1This option allows corrections to be made,
during the data transfer mode, to data
previously inputted by the user.
-The parameter specifies the default mode of
the editing function that the PAD performs.
-If this parameter is enabled, the PAD will
process editing characters. This only applies
to data transfer mode. Editing will always be
enabled 
(1) for command mode on terminals.
If this field is enabled, timers should be turned
off and the forwarding condition should be set
to transmit on carriage return. If this field is
disabled, all editing characters (LF, BS, etc.)
are lost in data transfer mode.
0= editing not enabled during data transfer
1 = editing enabled during data transfer
-This is X.3 parameter 15.
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