Technical data

Configuring Serial Lines
3.2 Setting Up a PPP Interface (Alpha Only)
3.2.1.3 Setting Up an Asynchronous Port
Use the DCL command SET TERMINAL and applicable qualifiers to set up an
asynchronous port for use with the modem.
• Setting up the PPP dialup provider
Enter the SET TERMINAL command and qualifiers appropriate for your
modem connection. (Note that some qualifiers require LOG_IO or PHY_IO
privilege, or both.) For example:
$ SET TERMINAL TTA0: /ALTYPEAHD /AUTOBAUD /DIALUP /DISCONNECT /EIGHTBIT -
_$ /MODEM /NOHANGUP /NOHOSTSYNC /NOPASTHRU /NOREADSYNCH /NOTTSYNCH -
_$ /PERMANENT /TYPE_AHEAD
Where:
/ALTYPEAHD Creates a permanent, alternate type-ahead buffer. (The system
parameter TTY_ALTYPADH determines the size of the type-
ahead buffer.) Helpful when transferring larger files. This
qualifier is required.
/AUTOBAUD Detects the incoming baud rate.
/DIALUP Specifies that the terminal is a dialup terminal. This qualifier is
required.
/DISCONNECT Ensures that the process is disconnected if the line detects a
hangup.
/EIGHTBIT Sets the terminal to use the 8-bit ASCII format. This qualifier is
required.
/MODEM Specifies the use of a modem. This qualifier is required.
/NOHANGUP Does not hang up the modem when the client logs off. This is the
default. This qualifier is required.
/NOHOSTSYNC Does not allow the use of Ctrl/S or Ctrl/Q functions from the
terminal to stop or resume transmission when the input buffer is
full or empty. This is the default.
/PASTHRU The terminal passes format-type data, such as carriage returns
and tabs, to an application program as binary data. This is the
default.
/NOREADSYNCH Does not allow the use of Ctrl/S or Ctrl/Q functions to
synchronize data transmitted from the terminal. This is the
default.
/NOTTSYNCH Does not allow transmission to be stopped or resumed by entering
Ctrl/S or Ctrl/Q, respectively.
/PERMANENT Saves the settings.
/TYPE_AHEAD Enables remote modems. Must be set. The terminal accepts
unsolicited input to the limit of the type-ahead buffer. This is the
default.
For detailed information about these and other SET TERMINAL qualifiers,
see the OpenVMS DCL Dictionary: N-Z.
• Setting up the PPP client (OpenVMS Alpha only)
Enter the SET TERMINAL command and qualifiers appropriate for
your connection, as listed for the dialup provider, with the exception of
/AUTOBAUD.
Set the baud rates using the /SPEED=(input-rate,output-rate) qualifier. If the
rates are the same, specify /SPEED=rate (for example, /SPEED=9600).
3–6 Configuring Serial Lines