Eicon Networks CX1 Especificações descarregar pdf (Página 46)

Across the Boards



Communications Device Drivers

Section 5 - General Configuration and Usage Information

Page 196

cfSOFTWARE Confidential,

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2000

5.11 Configuring the Telnet VT320 Drivers

MAINCON Configuration Panel: E4: “Telnet VT320”

MAINCON must be used to configure the Telnet VT320 drivers.

With the exception of the first panel, the MAINCON configuration for the Telnet VT320 drivers is identical to

that of the async/serial VT320 driver. This

Section

describes only the differences in the Telnet VT320

configuration.

The following options are not present in the Telnet VT320 configuration: XON/XOFF character, Keystroke

Delay, COMM port, Line Speed, Line Parity, Data Bits, and Stop Bits. Most of these are irrelevant to a Telnet

connection (for example Line Speed), while the others are replaced by Telnet internal functions (for example,

flow control is handled by TCP and Telnet, and not the XON/XOFF mechanism).

The Autowrap, Reset After BELL, Flicker Check Time, and Half Duplex options provide the same functions as

the async VT320 driver.

NOTE

: If Half Duplex is configured, the driver will refuse any attempt by the host to enter Telnet full

duplex mode.

The following new configuration options are added to the Telnet VT320 driver:

MAINCON can be used to enable a trace of the TCP/IP activity between the driver and the host. Entering a

trace size other than zero (the default) will enable the trace. The trace data is kept in a circular buffer and will

be written when the driver is closed. A file called TCPTRAC.BUF will be produced in the current working

directory. The program TRACEFMT.EXE will format the TCPTRAC.BUF file.

MAINCON can be used to alter the default destination port on the host. If nothing is entered MAINCON will

default to the Telnet Well-Known-Port (#23).

MAINCON can also be used to force the driver to negotiate “Binary” mode. Binary mode prevents the host

from interpreting the standard NVT control characters. Some hosts require this mode. This should usually be

configured as “ASCII” (the default).

Operation of Telnet VT320 Drivers

These drivers implement all Telnet and VT320 functions including NVT mode. A new MAINCON

configuration panel exists to support these drivers. This allows the configuration of VT320 options, the size of

the internal trace buffer, the default destination port address to use if the Telnet well-known-port is not being

used, and whether or not the driver should negotiate binary mode.

When first opened, the drivers display an NVT screen with a message requesting entry of the host name or

address. The NVT screen is a scrolling TTY-like display.

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