HP OpenVMS DCL Dictionary

SET HOST/DTE

Connects your system to a remote system through an outgoing terminal line.
You must have an account on the remote system in order to log in to that system after the connection is made. You must also have the ability to assign a channel to the terminal port specified. Your system manager can set the device protection on the terminal port to allow you access.

Format

SET HOST/DTE terminal-name

Parameter

terminal-name
Specifies the name of an outgoing terminal line, which connects your system directly to another system or modem.

Description

The SET HOST/DTE command allows you to connect your terminal to another system. Once the connection is made, the remote system prompts for a user name and password. You must have an account on the remote system to log in.
Once you have logged in to the remote system, you can use DCL commands just as you would on your local system.
To log in on lines that expect a break rather than a carriage return, press Ctrl/break-character to generate the break.
While connected to the remote system, you can issue configurational commands from DTE command mode. DTE commands enable you to configure a SET HOST/DTE session while it is in progress.
To issue DTE commands, you must get into DTE command mode by pressing Ctrl/command character. By default, the command character is the at sign (@). Once you are in command mode, the DTEPAD prompt will be displayed on your screen.
Table DCLII-18 describes the DTE commands.

Table DCLII-18 SET HOST/DTE Session Commands
Command Description

CLEAR Disconnects your local system from DTEPAD. This command is equivalent to the QUIT command.

EXIT Returns the session to emulation mode.

QUIT Disconnects your local system from DTEPAD. This command is equivalent to the CLEAR command.

SAVE filespec Saves information on the current configuration settings. The current settings are written to the specified file as a series of SET DTE commands. You can later use this file as an initialization file.

SEND BREAK Sends a break to remote systems that expect a break rather than a carriage return.

SET DTE Modifies configurable characteristics of DTEPAD while in a SET HOST/DTE session. You can use the SET HOST/DTE qualifiers in command mode.

SHOW DTE Displays the current settings of all the configurable characteristics of DTEPAD. It also displays the number of bytes of data transmitted and received during the current SET HOST/DTE session and the number of errors detected by the terminal port.

SPAWN Creates a subprocess of your current local process. The command is identical to the DCL SPAWN command except that the DTE SPAWN command has fewer qualifiers, as follows:
/INPUT=filespec
/LOGICAL_NAMES and /NOLOGICAL_NAMES
/OUTPUT=filespec
/PROCESS=subprocess-name
/SYMBOLS and /NOSYMBOLS
/WAIT and /NOWAIT

See the SPAWN command in this manual for more information about these qualifiers.

To terminate a session, you should first log out of the remote system. Then quit DTEPAD by pressing Ctrl/escape-character. By default, the escape character is a backslash (\). Alternatively, quit DTEPAD by entering the QUIT or the CLEAR command from DTE command mode.

**Table DCLII-18 SET HOST/DTE Session Commands**
Command	Description
CLEAR	Disconnects your local system from DTEPAD. This command is equivalent to the QUIT command.
EXIT	Returns the session to emulation mode.
QUIT	Disconnects your local system from DTEPAD. This command is equivalent to the CLEAR command.
SAVE filespec	Saves information on the current configuration settings. The current settings are written to the specified file as a series of SET DTE commands. You can later use this file as an initialization file.
SEND BREAK	Sends a break to remote systems that expect a break rather than a carriage return.
SET DTE	Modifies configurable characteristics of DTEPAD while in a SET HOST/DTE session. You can use the SET HOST/DTE qualifiers in command mode.
SHOW DTE	Displays the current settings of all the configurable characteristics of DTEPAD. It also displays the number of bytes of data transmitted and received during the current SET HOST/DTE session and the number of errors detected by the terminal port.
SPAWN	Creates a subprocess of your current local process. The command is identical to the DCL SPAWN command except that the DTE SPAWN command has fewer qualifiers, as follows: /INPUT=filespec /LOGICAL_NAMES and /NOLOGICAL_NAMES /OUTPUT=filespec /PROCESS=subprocess-name /SYMBOLS and /NOSYMBOLS /WAIT and /NOWAIT See the SPAWN command in this manual for more information about these qualifiers.

Qualifiers

/BREAK=break-character
Selects the break character. The break character is used to generate a break on lines that expect a break rather than a carriage return. To generate a break, press Ctrl/break-character.
The break character can be any ASCII character between @ and z, except C, M, Q, S, Y, or the left bracket ([). You cannot select a character currently defined as either the command character (see the description of the /COMMAND=command-character qualifier) or the escape character (see the description of the /ESCAPE=escape-character qualifier).
The ASCII characters between @ and z include the alphabetic characters in both upper and lower cases, the at sign (@), the backslash (\), the right bracket (]), the circumflex (^), the underscore (_), and the grave accent (`).
By default, the break character is the right bracket (]).
/COMMAND=command-character
Selects the command character. Use the command character to access DTE command mode by pressing Ctrl/command-character.
The command character can be any ASCII character between @ and z, except C, M, Q, S, Y, or the left bracket ([). You cannot select a character currently defined as either the break character (see the description of the /BREAK=break-character qualifier) or the escape character (see the description of the /ESCAPE=escape-character qualifier).
The ASCII characters between @ and z include the alphabetic characters in both upper and lower cases, the at sign (@), the backslash (\), the right bracket (]), the circumflex (^), the underscore (_), and the grave accent (`).
By default, the command character is the at sign (@).
/DIAL=(NUMBER:number[,MODEM_TYPE:modem-type])
Allows a modem attached to the outgoing terminal line to be autodialed using the autodial protocol of that modem. The NUMBER keyword is the telephone number to be autodialed and is a required parameter.
Before you dial a new number, you must log out of the current remote system.
On Alpha, the MODEM_TYPE keyword defaults to DMCL (any modem that uses the DEC Modem Command Language).
On VAX, the MODEM_TYPE keyword is optional. It can be used to specify any of the following modem types:

DMCL (any modem that uses the DEC Modem Command Language)
DF03 (default)
DF112

Each modem type requires a specific modem dialer code. Check with your system manager to see which modem dialer codes are installed on your system.
In addition, the MODEM_TYPE keyword can be used to specify a modem type other than DF03, DF112, or DMCL. A template is provided for users interested in supporting other modems with autodial capabilities (see SYS$EXAMPLES:DTE_DF03.MAR).
/ECHO

/NOECHO (default)
Determines whether the terminal input is echoed by your local system. By default, all echoing is performed by the remote system.
/EIGHT_BIT (default)

/NOEIGHT_BIT
Determines whether the outgoing terminal line supports 8-bit or 7-bit characters. By default, 8-bit characters are supported. If you specify /NOEIGHT_BIT, then 7-bit characters are supported.
/ERROR_ACTION=CONTINUE (default)

/ERROR_ACTION=EXIT
Specifies the error action by using the EXIT or the CONTINUE keyword.
When an error is detected on the outgoing terminal line, the error is reported to the local system and an error message is displayed on your terminal.
If the error action is CONTINUE, then communication with the remote system continues uninterrupted.
If the error action is EXIT, then the local system immediately exits from the remote system.
/ESCAPE=escape-character
Selects the escape character. You can use the escape character to exit from DTEPAD by pressing Ctrl/ escape-character.
The escape character can be any ASCII character between @ and z, except C, M, Q, S, Y, or the left bracket ([). You cannot select a character currently defined as either the break character (see the description of the /BREAK=break-character qualifier) or the command character (see the description of the /COMMAND=command-character qualifier).
By default, the escape character is a backslash (\).
The ASCII characters between @ and z include the alphabetic characters in both upper and lower cases, the at sign (@), the backslash (\), the right bracket (]), the circumflex (^), the underscore (_), and the grave accent (`).
/FLOW_CONTROL (default)

/NOFLOW_CONTROL
Determines whether XON/XOFF flow control is enabled. By default, flow control is enabled.
XON/XOFF flow control is a means of preventing data-overrun errors. Incoming data is stored in receive buffers; when these buffers are full, a signal is sent to the remote system to stop transmission. Once there is sufficient space in the receive buffers, another message is sent to restart transmission.
You should disable XON/XOFF flow control when the remote system has no XON/XOFF flow control.
/INIT[=filespec] (default)

/NOINIT
Sets the configurable characteristics of DTEPAD according to values contained in the specified initialization file.
If you use qualifiers in the command line to define the values of any of the configurable characteristics, these will supersede the values contained in the initialization file.
By default, DTEPAD tries to translate the logical name DTEPAD$INI in order to find the appropriate initialization file. If you use the /INIT qualifier and omit the file specification, DTEPAD translates the logical name DTEPAD$INI and finds the appropriate file. If DTEPAD$INI is not defined, then DTEPAD uses /NOINIT as the default.
An initialization file can contain any combination of any of the following DTE commands:

SAVE
SEND BREAK
SET DTE
SPAWN

The following is an example of an initialization file:
SET DTE/MAX_BUFFERS=150 SET DTE/READ_DELAY=100 SEND BREAK
/LOG[=filespec]

/NOLOG (default)
Controls whether a log file of the session is kept.
If you use the /LOG qualifier and omit the file specification, then the log information is written to the file DTEPAD.LOG.
When used to log a modem session, the log file contains any noise that occurred on the phone line. For example, typing a file in order to get it recorded in the log file could result in noise being recorded along with the file data. Therefore, the use of a log file is not recommended for the purpose of file transfers.
HP recommends that you use asynchronous DECnet to transfer files.
/MAX_BUFFERS=number-buffers
Specifies the maximum number of receive buffers. Receive buffers are buffers used to receive incoming data from the modem port. They are allocated as they are required.
By default, the maximum number of receive buffers is 100. The minimum number you can specify is 20.
/PARITY=NONE (default)

/PARITY=ODD

/PARITY=EVEN
Selects parity on the outgoing terminal line.
/READ_DELAY=delay
Specifies the modem port read delay in milliseconds. The modem port read delay is the time interval during which data in the modem port is transferred into receive buffers at the terminal.
By default, the modem port read delay is 50 milliseconds. This is also the minimum value.
A long modem port read delay slows the rate at which data is displayed at your terminal, and also increases the risk of data-overrun errors; however, a longer read delay requires less CPU overhead.
/SPEED=(output-rate,input-rate)
Sets the baud rate at which the terminal receives and transmits data. If the input and output rates are the same, specify the qualifier as /SPEED=rate.
Not all terminals support different input and output baud rates. For specific information on baud rates for your terminal, consult the manual for that terminal.
The default transmission rates are installation dependent.
The valid baud rates are as follows:
50 150 1800 4800 38400 75 300 2000 7200 57600 110 600 2400 9600 76800 134 1200 3600 19200 115200
If you select an invalid or unsupported speed, then the terminal line speed will remain set at its previous value.

Examples

#1
$ SET HOST/DTE TTA2:/DIAL=NUMBER:5551234 Username: SMITH Password:

This command connects the user terminal to the outgoing terminal line TTA2:, which is attached to a modem (type DF03 by default) set to autodial the phone number 555-1234. The remote processor then prompts for user name and password. Use the normal login procedure to log in to the remote system.

#2
$ SET HOST/DTE/DIAL=(NUMBER:5551234#,MODEM_TYPE:DF112) TTA2: Username: SMITH Password:

This command accomplishes the same thing as in the first example, except that it uses the DF112 modem. The number sign (#) is required to activate the autodialer in the DF112.

#3
$ SET HOST/DTE/NOEIGHTBIT TTA2

This command sets the outgoing terminal port, TTA2, to support 7-bit characters.

#4
$ SET HOST/DTE/NOFLOW_CONTROL TTA2

This command disables the XON/XOFF flow control.

#5
$ SET HOST/DTE/ERROR_ACTION=EXIT TTA2

This command sets the error action to EXIT.

#6
$ SET HOST/DTE/MAX_BUFFERS=150 TTA2

This command sets the maximum number of receive buffers to 150.

#7
$ SET HOST/DTE/ESCAPE=E TTA2

This command defines the letter E as the escape character. Note that DTEPAD is not case sensitive.

#8
$ SET HOST/DTE/LOG TTA2

This command enables logging of the session. Since no log file is specified, the log is written to the default log file, DTEPAD.LOG.

#9
$ SET HOST/DTE/INIT=MYFILE.INI TTA2

This command uses the initialization file MYFILE.INI.

#10
$ `[Ctrl/]`@ DTEPAD>

This example shows you how to access DTE command mode by pressing Ctrl/@, where @ is the command character.

#11
DTEPAD> SAVE MYFILE.INI

This command saves the information on the current configuration in the file MYFILE.INI.

#12
DTEPAD> SET DTE/BREAK=G

This command defines the letter G as the break character.

#13
DTEPAD> SET DTE/ECHO

This command sets the terminal port so that echoing is performed by the local system.

#14
DTEPAD> SET DTE/SPEED=4800

This command sets the input and output baud rates to 4800.

#15
DTEPAD> SET DTE/LOG=myfile.log

This command directs logging to the file MYFILE.LOG.

#16
DTEPAD> SHOW DTE Port TXA0 EIGHT_BIT ECHO Flow control XON/XOFF Parity NONE Transmit Speed 4800 Receive Speed 4800 Error action CONTINUE Break character B Escape character \ Command character @ Maximum buffers 100 Read delay 50 milliseconds Log file MYFILE.INI Number dialed 12345678 Modem type DF03 Bytes transmitted 75 Bytes received 132 Errors 0

#16

DTEPAD> SHOW DTE
  Port TXA0              EIGHT_BIT ECHO
  Flow control           XON/XOFF
  Parity                 NONE
  Transmit Speed         4800
  Receive Speed          4800
  Error action           CONTINUE
  Break character        B
  Escape character       \
  Command character      @
  Maximum buffers        100
  Read delay             50 milliseconds
  Log file               MYFILE.INI
  Number dialed          12345678
  Modem type             DF03
  Bytes transmitted      75
  Bytes received         132
  Errors                 0

This command displays all the current settings of the configurable characteristics, the number of bytes transmitted and received, and the number of errors detected.

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