Eicon Networks S52 Guide de l'utilisateur télécharger pdf (Page 30)

Using the Eiconcard Host PAD and Eiconcard Terminal PAD

page 28

The Eiconcard Terminal PAD driver is used to make outgoing uucp calls. The uucp configuration

files must be set to your specific requirements before you make a call. For information on

configuring these files, see

The uucp Configuration Files on page 31.

To modify the outgoing call, use tpaddir with a conn command or use the cu CALL command.

X.28 is a CCITT recommendation that defines the messages that a terminal can send to a

PAD. The X.28 PAD command signals may be entered in uppercase or lowercase. Before any

PAD command interpretation is performed, all control characters, including DEL and spaces,

are stripped from the editing buffer.

For uucp, the connection and login must be automated. When the PAD is started, the PAD

Identification PAD service signal is sent, followed by a prompt. The standard prompt is the

“*” (asterisk) character. The Prompt PAD service signal will be displayed if the initial PAD

parameter 6 has value 4 set (that is, equals 4 or 5). Therefore, the first Expect string is “*”.

The Send string should be a call request string that contains no intervening spaces.

Note: You can include spaces in a call request string if you enter them in hexadecimal or octal

format (e.g., a space is \040, the “C”-like escape sequence for octal 40).

The cu Commands

You can use the following cu commands with the configured Eiconcard Terminal PAD devices.

When a virtual call is established, a blank command line causes a return to the data transfer

state. Otherwise, the blank line is ignored.

Selection PAD command signal

The Selection PAD command signal syntax consists of a facility request block or an address

block, or both, optionally followed by a call-user data field.

This standard PAD command signal, defined in recommendation X.28-3.5.15, is not

implemented in this version of the PAD.

Note: The commands listed below are not case-sensitive. For example, you can enter the call

or CALL command.

call

The call PAD service signal provides the only outgoing call mechanism.

*call address [/facilities [/userdata]]

This establishes a call to the given X.25 address, with the specified facilities and call-user

data. Valid X.25 addresses are strings of 1 to 15 digits. Facilities are numbers from 0 to 255,

separated by commas. The facilities field may be empty, or contain up to 109 octets.

The call-user data is a set of numbers from 0 to 255, separated by commas and/or quoted

strings. If the call-user data field starts with a minus symbol (-), the standard PAD protocol

identifier 1,0,0,0 is suppressed in the call-user data. Up to 16 octets of call-user data are

allowed (including the PAD protocol identifier), but this maximum is 128 octets when used

with the fast select facility. If a virtual call is already established when this command is invoked,

the error message Already connected is displayed. This PAD command signal is provided as

an extension to the standard PAD functionality.

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Eicon Networks S52 Guide de l'utilisateur Page 30