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DataPac settable Parameters Docs




DATAPAC 3101  ITI PARAMETERS DESCRIPTION
===================================================

     THE FOLLOWING WILL PROVIDE IN MORE DETAIL A DESCRIPTION OF ITI (84)
PARAMETERS FOR DATAPAC 3101.


DESCRIPTION
-----------

INTERNATIONAL PAD PARAMETERS

1)ABILITY TO ESCAPE FROM DATA TRANSFER STATE*


     THE SETTING OF THIS PARAMETER ALLOWS THE USER TO INTERRUPT THE
COMMUNICATION
OF HIS OR HER APPLICAION (DATA TRANSFER MODE) AND INTERACT WITH THE
PAD (COMMAND MODE).  THE CHARACTER TO DO THIS IS CONTROL P. TO RETURN
TO DATA TRANSFER MODE, PRESS THE CARRIAGE RETURN OR ENTER A BLANK COMMNAND LINE
IF THE USER WANTS TO SEND A CONTROL P TO THE HOST, WITH THIS PARAMETER SET
TO ONE,
SIMPLY HIT CONTROL P TWICE AND THE SECOND CONTROL P WILL GO TO THE HOST AND
THE USER WILL REMAIN IN DATA TRANSFER MODE. THIS ALSO APPLIES TO THE USER DATA
FIELD IN THE CALL REQUEST COMMNAND LINE.

      PARAMETER NUMBER:  1
      POSSIBLE VALUES:   0 = ESCAPE NOT POSSIBLE
                         1 = ESCAPE IS POSSIBLE

     * NOTE:  ESCAPE FROM DATA TRANSFER MODE MAY ALSO BE POSSIBLE USING
THE BREAK SIGNAL IF PARAMETER SEVEN IS SET TO EIGHT.

2)ECHO*

     THIS PARAMETER INDICATES TO THE PAD WHETHER OR NOT THE TERMINAL
INPUT DATA MUST BE ECHOED.  THIS MAY BE REQUIRED IF THE USER"S TERMINAL
CANNOT ECHO BACK WHAT IS BEING ENTERED.

      PARAMETER NUMBER:  2
      POSSIBLE VALUES:   0 = NO ECHO
                         1 = ECHO
     * NOTE:  ECHO WILL ALSO BE AFFECTED BY THE SETTING OF PARAMETER 20.

3)SELECTION OF DATA FORWARDING SIGNAL

     THIS PARAMETER INDICATES TO THE PAD THE SET TO TERMINAL GENERATED
CHARACTERS OR CONDITIONS THAT WILL CAUSE DATA TO BE FORWARDED TO THE
DESTINATION.  FOR EXAMPLE (CR) CAN BE USED AS A DATA FORWARDING SIGNAL.
ON RECEIPT OF A (CR) FROM THE LOCAL DTE Y, THE PAD WILL FORWARD ALL
CHARACTERS IN IT'S BUFFER TO THE REMOTE END INCLUDING THE (CR).  IF
P13 IS SET TO 6,7,22 OR 23, A (LF) WILL BE INCLUDED IN THE PACKET AND
WILL DELIMIT IT.  DATA IS ALSO FORWARDED WHEN THE BUFFER IS FULL WHETHER OR
NOT A FORWARDING CHARACTER IS RECEIVED.

      PARAMETER NUMBER:  3
      POSSIBLE VALUES:   0 NO DATA FORWARDING SIGNAL
                         2 = FORWARD ON CARRIAGE RETURN
                         2 = CARRIAGE RETURN
                         126 = ALL CHARACTERS IN COLUMNS 0 AND 1 OF ASCII
                               TABLE AND THE CHARACTER DEL OF
                               INTERNATIONAL ALPHABET #5 (SEE APPENDIX 1)

4)SELECTION OF IDLE TIMER DELAY

     THIS PARAMETER IS USED TO DETERMINE THE IDLE TIMER LIMIT VALUE
WHEN DATA FORWARDING IS BASED ON TIMEOUTS. TO OPTIMIZE PACKETIZING OF
DATA, NO DATA FORWARDING SIGNAL NEED BE SPECIFIED.  THE PAD WILL THEN
PACKETIZE DATA BASED ON PACKET SIZE SPECIFIED (256 OR 128 CHARACTERS).
THE IDLE TIMER IS USED TO SEND ANY PACKETS THAT ARE NOT FULLY FILLED.  IF
IDLE TIMER IS ACTIVATED AND THE HOST REQUIRES THE (CR) TO INPUT DATA, IT STILL
MUST BE PROVIDED BEFORE THE DATA SENT IS ACCEPTED BY THE HOST.  THE IDLE
TIMER DOES NOT SEND ANY EMPTY PACKETS.


     PARAMETER NUMBER:  4
     POSSIBLE VALUES: 0 = NO DATA FORWARDING ON TIMEOUT IS REQUIRED
                  1-255 = INDICATES THE VALUE OF THE DELAY IN TWENTIES
                          OF A SECOND.  (IE. A VALUE OF 250
                          MAKES THE TIMER WAIT 10 SECONDS).

* NOTE:  WHEN EDITING IS ON (P15:1), THE IDLE TIMER IS INACTIVE.
IF THIS IS THE ONLY DATA FORWARDING CONDITION, TURNING THE EDITING
FUNCTION ON COULD CAUSE A USER TERMINAL TO HANG OR DATA NOT TO BE
FORWARDED.

5)AUXILIARY DEVICE CONTROL*

     THIS IS USED FOR FLOW CONTROL OF DATA COMING FROM EITHER A PC OR
 AUXILIARY DEVICE, EG., A PAPER TAPE MACHINE.  WHEN SET TO 1 IT
INDICATES TO THE PAD THAT THE DATA IS TO BE READ AN AUXILIARY I/O DEVICE.
CONNECTED TO THE TERMINAL.  THIS PARAMETER SET TO 2 INDICATES THAT THE
DATA IS COMING FROM AN INTELLIGENT DEVICE, IE. A PC. AND THAT THE PAD MUST
EXERT FLOW CONTROL DIFFERENTLY.

      PARAMETER NUMBER:  5
      POSSIBLE VALUES:   0 = NO USE OF X-ON/X-OFF
                         1 = USE OF X-ON/X-OFF FOR AUXILIARY DEVICES
                         2 = USE OF X-ON/X-OFF FOR INTELLIGENT TERMINALS

     * NOTE:  A VALUE OF 2 IS RECOMMENDED FOR PC'S

6)SUPPRESS NETWORK MESSAGES

     THIS PARAMETER INDICATES THE PAD WHETHER OR NOT NETWORK GENERATED
MESSAGES ARE TO BE TRANSMITTED TO THE TERMINAL.

      PARAMETER NUMBER:  6
      POSSIBLE VALUES    0 = SUPPRESS MESSAGES
                         1 = TRANSMIT MESSAGES
                         5 = PAD PROMPT (*) FOLLOWS DATAPAC SERVICE SIGNALS


7) PROCEDURE ON BREAK *

     THIS PARAMETER IS USED TO INDICATE HOW THE PAD SHOULD PROCESS A BREAK
SIGNAL THAT IS RECEIVED FROM THE TERMINAL WHILE THE TERMINAL IS IN DATA
TRANSFER STATE.

      PARAMETER NUMBER:  7
      POSSIBLE VALUES:   0 = NOTHING (REMAIN IN DATA TRANSFER MODE)
                         1 = INTERRUPT (REMAIN IN DATA TRANSFER MODE)
                         2 = RESET (REMAIN IN DATA TRANSFER MODE)
                         4 = SEND AN "INDICATION OF BREAK" MESSAGE TO
                             THE PACKET MODE DTE (REMAIN IN DATA TRANSFER
                             MODE)
                         8 = ESCAPE FROM DATA TRANSFER MODE, (IE, ENTER
                             COMMAND MODE)
                        16 = DISCARD OUTPUT TO TERMINAL ACTIVATE
                             PARAMETER 8 (P8:1) (REMAIN IN DATA
                             TRANSFER MODE)
                        21 = A COMBINATION OF 1,4 AND 16


     * NOTE:  THE BREAK SIGNAL IS IGNORED IF THE VIRTUAL CIRCUIT IS NOT
ESTABLISHED.WHILE IN COMMAND STATE.  THE BREAK SIGNAL WILL DELETE THE
CURRENT LINE.

1 THE VALID VALUES FOR P 7 ARE 0,1,2,8 AND 21.

8)DISCARD OUTPUT

     THIS PARAMETER IS USED IN CONJUNCTION WITH PARAMETER 7.  DEPENDING
UPON THE BREAK PROCEDURE SELECTED, THIS PARAMETER MAY BE SET BY THE PAD
WHEN THE TERMINAL USER REQUESTS THAT TERMINAL DATA BE DISCARDED. THIS
PARAMETER MUST THEN BE RESET BY THE DESTINATION COMPUTER TO ALLOW NORMAL
DELIVERY.  THE PAD WILL DISCARD ALL PACKETS DESTINED FOR THE TERMINAL
FROM THE TIME THE PAD SETS THIS PARAMETER (IE, IT RECEIVES A BREAK SIGNAL
WHEN PARAMETER 7 IS SET TO 21) TO THE TIME THE PARAMETER IS RESET BY THE
DESTINATION.  IT CAN ONLY BE RESET BY THE DESTINATION.

      PARAMETER NUMBER:  8
      POSSIBLE VALUES:   0 = NORMAL DELIVERY OF OUTPUT TO TERMINAL
                         1 = DISCARD OUTPUT TO TERMINAL


9)PADDING AFTER CARRIAGE RETURN

    THIS PARAMETER IS USED TO SPECIFY THE NUMBER OF PADDING CHARACTERS TO
BE INSERTED BY THE PAD FOLLOWING A CR R TRANSMITTED TO THE TERMINAL.
PADDING ALLOWS TIME FOR THE CARRIAGE TO RETURN ON MECHANICAL PRINTING DEVICES

      PARAMETER NUMBER:  9
      POSSIBLE VALUES:   0 = 2 PADDING CHARACTERS WILL BE INSERTED AT 110 BPS
                               AND 4 PADDING CHARACTERS WILL BE INSERTED AT
                               HIGHER SPEEDS, IN COMMAND MODE ONLY.
                               (NO PADDING IS DONE IN DATA TRANSFER MODE)
                     1-255 = THE NUMBER OF PADDING CHARACTERS TO BE
                             INSERTED IN BOTH DATA TRANSFER AND COMMAND
                             MODE.
10)LINE FOLDING

     THIS PARAMETER INDICATES THE MAXIMUM NUMBER OF PRINTABLE CHARACTERS
THAT CAN BE DISPLAYED ON THE TERMINAL BEFORE THE PAD MUST SEND A
FORMAT EFFECTOR (IE.,<CR><LF>).  THIS PERMITS MORE DATA TO BE
TRANSMITTED IN ONE PACKET WHILE STILL LETTING THE USER PRINT OUT
MORE THAN ONE LINE, IE., PRINTING OUT FORMS.

11)TRANSMISSION SPEED (READ ONLY)

     THIS PARAMETER IS SET BY THE PAD AS A RESULT OF TRANSMISSION SPEED
 DETECTION IF THE TERMINAL ACCESSES AN AUTOBAUD PORT.  WHEN A PRIVATE
PORT WITH FIXED SPEED IS USED, THIS PARAMETER IS SET BASED ON THE
 PRE-STORED INFORMATION SELECTED AT SUBSCRIPTION TIME.

      PARAMETER NUMBER:  11
      POSSIBLE VALUES:    0 = 110 BPS
                          2 = 300 BPS
                          3 = 1200 BPS
                          4 = 2400 BPS

12)FLOW CONTROL

     THIS PARAMETER ALLOWS THE TERMINAL USER TO SIGNAL THE PAD THAT THE
TERMINAL CANNOT RECEIVE ANY MORE DATA, IE. TO FLOW CONTROL DATA COMING
FROM THE NETWORK.  WHEN IT IS SET TO 1, THE TERMINAL USER CAN REQUEST
THAT THE PAD STOP SENDING DATA BY TRANSMITTING A "CONTROL S".  THE
PAD THEN SUSPENDS TRANSMISSION OF DATA UNTIL A "CONTROL Q" IS RECEIVED.

      PARAMETER NUMBER:  12
      POSSIBLE VALUES:    0 = NO USE OF X-ON/X-OFF FOR FLOW CONTROL
                          1 = USE X-ON/X-OFF FOR FLOW CONTROL

13)LINEFEED INSERTION (SIMILAR TO NATIONAL PARAMETER 126)

      THIS PARAMETER SPECIFIES WHEN THE PAD SHOULD INSERT LINEFEEDS <LF>
UPON RECEIPT OF A CARRIAGE RETURN <CR> FROM THE TERMINAL, PAD OR THE
DESTINATION HOST.

      PARAMETER NUMBER:  13
      POSSIBLE VALUES:    0 = INSERT NO <LF>
                          1 = INSERT <LF> TO TERMINAL UPON RECEIPT OF A
                              <CR> FROM HOST
                          4 = INSERT <> TO TERMINAL AFTER A <CR> FROM
                              TERMINAL OR ON PAD GENERATED <CR>
                          5 = INSERT <LF> TO TERMINAL ON <CR> FROM PAD
                              TERMINAL OR HOST.
                          6 = INSERT <LF> TO TERMINAL ON <CR> FROM
                              TERMINAL AND INSERT <LF> IN DATA HOST
                              ON <CR> FROM TERMINAL
                          7 = INSERT <LF> TO TERMINAL ON <CR> FROM
                              PAD, TERMINAL OR HOST AND INSERT LF
                              IN DATA TO HOST ON <CR> FROM TERMINAL
                         16 = INSERT <LF> TO TERMINAL AFTER A PAD
                              GENERATED <CR>
                         17 = INSERT <LF> TO TERMINAL AFTER A PAD
                              GENERATED <CR> OR A HOST GENERATED <CR>
                         20 = INSERT <LF> TO TERMINAL ON <CR> FROM
                              TERMINAL
                         22 = INSERT <LF> TO TERMINAL ON <CR> FROM
                              <CR> FROM TERMINAL
                         23 = INSERT <LF> TO TERMINAL ON <CR> FROM
                              TERMINAL OR HOST.  INSERT <LF> IN DATA
                              TO HOST ON <CR> FROM TERMINAL

14)PADDING CHARACTERS AFTER LINEFEED

     TO ALLOW TIME FOR MECHANICAL PAPERFEED, THIS PARAMETER IS USED TO
SPECIFY THE NUMBER OF PADDING CHARACTERS TO BE INSERTED BY THE PAD
FOLLOWING <LF> TRANSMITTED TO THE TERMINAL IN DATA TRANSFER MODE ONLY.

      PARAMETER NUMBER:  14
      POSSIBLE VALUES:0-255 = NUMBER OF PADDING CHARACTERS (NUL)
                              SENT TO THE TERMINAL AFTER TRANSMISSION
                              OA A <LF> TO THE TERMINAL.

15)CONTROL OF EDITING FUNCTIONS

     THIS PARAMETER SPECIFIES WHETHER OR NOT EDITING IS ALLOWED IN DATA
TRANSFER MODE.  IT IS ALWAYS AVAILABLE IN COMMAND MODE. THIS CONTROLS
PARAMETERS 16, 17 AND 18.

      PARAMETER NUMBER:  15
      POSSIBLE VALUES:    0 = EDITING ONLY IN COMMAND MODE
                          1 = EDITING IN COMMAND AND DATA TRANSFER MODE

     * NOTE:  SETTING PARAMETER 15 TO 1 WILL CAUSE THE OPERATION OF THE
IDLE TIMER (PARAMETER 4) TO BECOME DISABLED.

16)CHARACTER DELETION (SIMILAR TO NATIONAL PARAMETE 118)

     THIS PARAMETER SPECIFIES THE ASCII CHARACTER TO BE USED AS A
"CHARACTER DELETE" CHARACTER FOR LOCAL EDETING BY THE PAD.  THE
DEFAULT VALUE IS SET TO 127 (THE DELETE OR DEL KEY.

      PARAMETER NUMBER:  16
      POSSIBLE VALUES:    0 = TURN OFF CHARACTER EDETING (COMMNAD & DATA
                             TRANSFER MODE)
                      1-127 = CHARACTER DELETE CHARACTER (APPENDIX K)

17)LINE DELETION (SIMILAR TO NATIONAL PARAMETER 119)


     THIS PARAMETER SPECIFIES THE ASCII CHARACTER TO BE USED AS A
"LINE DELETE" CHARACTER FOR LOCAL EDITING BY THE PAD. THE DEFAULT
VALUE IS SET TO 24 (CONTROL X).  ON SOME OLDER TERMINALS THE CONTROL
X KEY WILL CLEAR THE SCREEN AS WELL AS DELETE THE LINE.

      PARAMETER NUMBER:  17
      POSSIBLE VALUES     0 = NO KEY WILL DELETE A CHARACTER
                      1-127 = ASCII CODE FOR THE "LINE DELETE" CHARACTER

18)LINE DISPLAY (SIMULAR TO NATIONAL PARAMETER 120)

     THIS PARAMETER SPECIFIES THE ASCII CHARACTER TO BE USED AS A
"LINE DISPLAY " CHARACTER FOR LOCAL EDITING BY THE PAD.  THE DEFAULT
VALUE IS SET TO 18 (CONTROL R).,

      PARAMETER NUMBER:  18
      POSSIBLE VALUES:    0 = NO KEY WILL DELETE A CHARACTER
                      1-127 = ASCII CODE FOR THE "LINE DISPLAY" CHARACTER

19)EDITING SERVICE SIGNALS


THIS PARAMETER DEFINES THE FORMAT OF THE SERVICE SIGNAL SENT TO TERMINAL
UPON EXECUTION OF THE EDITING FUNCTIONS (P16 OR P17)
      PARAMETER NUMBER:  19
      POSSIBLE VALUES:    0 = NO SERVICE SIGNAL ON EDITING
                          1 = BACKSLASH IS DISPLAYED FOR EACH CHARACTER
                              DELETED, "***" IS DISPLAYED FOR EACH LINE
                              DELETED
                          2 = <BS><SP><BS> IS DISPLAYED FOR EACH
                              CHARACTER DELETED; <BS><SP><BS> IS
                              REPEATED FOR EACH CHARACTER ON THE LINE
                              DELETED
PARAMETER 19         8**, 32-126 = THE SPECIFIED CHARACTER IS DISPLAYED
                                   FOR EACH CHARACTER DELETED; "***" IS
                                   DISPLAYED FOR EACH LINE DELETED.

     *NOTE:  VALUE 1 IS RECOMMENDED FOR PRINTING TERMINALS AND VALUE 2
             WHEN PAD ECHO IS OFF (P2=0) AND THE CHARACTER DELETE" CHARACTER
             IS DEFINED AS <BS> (P16=8), THE PAD DOES NOT SEND AND EDITING
             SERVICE SIGNAL TO THE TERMINAL UPON EXECUTION TO THE CHARACTER
             DELETE EDITING FUNCTION; HOWEVER, THE CHARACTER WILL STILL BE
             DELETED FROM THE PAD BUFFER.
FOR VIDEO DISPLAY TERMINALS.

PRODUCE A <BS>, BUT THE CHARACTER WILL STILL BE DELETED FROM THE PAD.

20)ECHO MASK*

     THIS PARAMETER SPECIFIES A SET OF CHARACTERS NOT TO BE ECHOED TO THE
TERMINAL.

      PARAMETER NUMBER:  20
      POSSIBLE VALUES:    0 = ALL CHARACTERS ECHOED (EXCEPT X-ON/X-OFF
                              WHICH DEPEND ON THE SETTING OF P5, P12
                              AND P22)

                          1 = NO ECHO OF <CR>
                          2 = NO ECHO OF <LF>
                          4 = NO ECHOE OF <VT>, <HT>, <FF>
                          8 = NO ECHO OF <BEL>, <BS>
                         16 = NO ECHO OF <ESC>, <ENQ>
                         32 = NO ECHO OF <ACK>, <NAK>, <STX>, <SOH>,
                              <EDT><ETB>, <ETX>
                         64 = NO ECHOING OF EDITING CHARACTERS, AS
                              DESIGNATED BY PARAMETER 16,17 AND 18
                        128 = NO ECHOING OF ALL OTHER CHARACTERS IN
                              COLUMN 0 AND 1 OF ASCII TABLE IN
                              APPENDIX I PLUS <DEL>

     * NOTE:  THIS PARAMETER IS ONLY ACTIVE WHEN ECHO IS ON (P2 = 1).

21)PARITY DETECTED OR CHECKED (SIMILAR TO NATIONAL PARAMETER 123)

     THIS PARAMETER SPECIFIES WHETHER OR NOT THE PAD SHOULD DETECT,
CHECK AND GENERATE PARITY.  THIS PARAMETER IS SET TO 0 WHEN THE USER
WISHES TO TRANSMIT 8-BIT DATA.

      PARAMETER NUMBER:  21
      POSSIBLE VALUES:    0 = NO DETECTED OR CHECKED
                          3 = PARITY CHECKED AND DETECTED

22)PAGE WAIT

     THIS PARAMETER CONTROLS THE ABILITY TO SET A TERMINAL PAGE SIZE
WHICH, WHEN REACHED, CAUSES THE PAD TO STOP ALL FURTHER OUTPUT TO THE
TERMINAL.

      PARAMETER NUMBER:  22
      POSSIBLE VALUES:    0 = NO PAGE WAIT
                      1-255 = PAGE WAIT SIZE

THE PAD WILL RESUME NORMAL TRANSMISSION WHEN ANY OF THE FOLLOWING OCCURS:

    - ON RECEIPT OF THE PAGE WAIT CANCELLATION CHARACTER (X-ON); OR
    - ON RESETTING PARAMETER 22 TO ZERO.

NATIONAL PARAMETERS

===================


     THE FOLLOWING PARAMETERS ARE SPECIFIC TO THE DATAPAC INTERACTIVE
TERMINAL INTERFACE (DATAPAC 3101 SERVICE)

P118 CHARACTER DELETION


P119 LINE DELETION


P120 LINE DISPLAY


P121,122 ADDITIONAL DATA FORWARDING SIGNALS

     THESE PARAMETERS 121 AND 122 ALLOW THE DEFINITION OF ONE OR
TWO ADDITIONAL DATA FORWARDING SIGNALS.  THESE SIGNALS ARE IN ADDITION
TO ANY THAT ARE SPECIFIED BY PARAMETER 3 AND 4.

      PARAMETER NUMBER:  121,122
      POSSIBLE VALUES:     0 = NONE
                        1-127= ASCII CODE OF ADDITIONAL DATA FORWARDING
                               SIGNAL.

P123 PARITY TREATMENT

     THIS PARAMETER SPECIFIES WHETHER OR NOT THE PAD SHOULD DETECT AND
CHECK PARITY AND PERFORMS THE SAME FUNCTION AS INTERNATIONAL PARAMETER
21.

      PARAMETER NUMBER:  123
      POSSIBLE VALUES:     0 = NO DETECTED OR CHECKED
                           1 = PARITY CHECKED AND DETECTED

6)OUTPUT PENDING TIMER

     THIS PARAMETER SPECIFIES THE LENGTH OF TIME, IF ANY, THAT TERMINAL
OUTPUT WILL BE BLOCKED BY TERMINAL INPUT.

      PARAMETER NUMBER:  125
      POSSIBLE VALUES:     0 = OUTPUT
                      1-255  = VALUE OF DELAY IN SECONDS

7)LINEFEED INSERTION

      PARAMETER NUMBER:  126 SEE INTERNATONAL PARAMETER 13.


GENERAL NOTES ABOUT PARAMETERS

-------------------------------

     THE SETTING OF ANY OF PARAMETERS 16(118), 17(119), OR 18(120) TO
A NON-ZERO VALUE WILL ALSO SET PARAMETER 15 TO 1 WHEN PARAMETER 4 IS ZERO.
IN THE 1984 SOFTWARE LEVEL, SETTING BOTH EDITING (P15) IS OFF.  THIS
OPERATION IS ACCORDING TO CCITT 1984 STANDARDS.

     IF THE CHARACTER CHOSEN FOR A CERTAIN PARAMETER HAS ALREADY BEEN
SELECTED TO BE USED WITH ANOTHER PARAMETER, THEN THE FUNCTION WITH THE
HIGHEST PRIORITY IS SELECTED UPON RECEIPT OF THE CHARACTER.  THIS PRIORITY
SCHEME IS AS FOLLOWS:

     1) ESCAPE FROM COMMAND STATE
     2) FLOW CONTROL
     3) LINE DISPLAY
     4) LINE DELETE
     5) CHARACTER DELETE
     6) PACKET FORWARDING

ALL OF THE ABOVE PARAMETERS ARE CHANGEABLE BY THE USER.  HOWEVER, IT
SHOULD BE NOTED THAT THE HOST COMPUTER CAN ALSO CHANGE THESE PARAMETERS.


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