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DSI Signaling Server SGW Mode User Manual Issue 5

4.5 Command Entry

Each character entered is echoed to the operator’s terminal. The BS (backspace) or DEL (delete) character

can be used to delete characters entered within the current line. This causes the Signaling Gateway to output

the sequence BS space BS. On a visual display terminal, this has the effect of deleting the last character

entered from the display.

Commands can be entered whenever the command prompt has been output. Commands are terminated by

a semicolon (;) followed by CR. Commands may exceed one line on the terminal, but may not exceed 100

characters.

If a command takes parameters, a colon is used to separate the command from the parameters. A comma

(,) is used to separate multiple parameters.

To ensure correct operation of the character deletion, the maximum number of characters entered on a

single command line should be no greater than the number of characters that can be displayed on a single

line of the terminal (to prevent text “wrap around”). If a command is longer than one line, each line before

the last should be terminated with a complete parameter value followed by a comma and CR. The command

can then continue on the next line. If you wish to specify more parameters than can be entered on a single

initiate command, you should use the initiate command to enter mandatory parameters, then use a change

command to specify additional parameters.

A partially entered command can be aborted using the CAN character. The system outputs an indication that

the command has been aborted, followed by a prompt for new command input. The CAN character can also

be used to abort an output listing on the operators terminal.

4.6 Dangerous Commands

Commands that affect the Signaling Gateway operation are considered DANGEROUS commands. If a

DANGEROUS command is entered, the Signaling Gateway outputs the following on a new line:

Are you sure? [Y/N]

The operator must enter Y followed by CR to continue the execution of the command. Any other valid input

character apart from SP or CR, followed by CR, causes the command to be aborted.

4.7 Changing Configuration Data

Many configuration commands require that certain other commands have been entered first (for example to

block a link before removing a boards configuration). These rules are described on a per-command basis as

prerequisites.

4.8 Command Responses

The Signaling Gateway does not, in general, produce output unless it is in response to an operator command.

The only exception to this is the auto log off warning message and the log off message (when log off is

initiated automatically).

The auto log off warning message is as follows:

WARNING: Auto log off imminent!

When a syntactically correct command has been issued to the Signaling Gateway, acceptance is indicated by

the Command Executed output as follows:

EXECUTED

An invalid command is not acted upon. The Signaling Gateway indicates command rejection by issuing one of

the responses in Table 1. Only the first error detected in a command is indicated.

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