Test Parameter

Syntax: <CMD_NAME>=?

This is sent by the DTE to determine the parameter values supported by the DCE.

If the command is supported, the DCE returns the supported parameter values, using the information text format, as an ordered list enclosed by a () (left and right parentheses characters). (ASCII 40 and 41 decimal).

If the value is a compound one, the supported values are reported, enclosed in parentheses and separated by commas. An ordered list consists of a single value, a set of values separated by commas, or as two values separated by a hyphen to denote an inclusive range of values.

An example DCE response to a parameter test is:

<CR><LF>(0-255),(0-2,5)<CR><LF>

If the command is not supported, the DCE returns the ERROR result code.

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