> 1.4.1 | Using Parameters

> • | Optional parameters are enclosed in square brackets. If optional parameters are omitted, the current settings are used until you change them.

> • | Optional parameters or subparameters can be omitted unless they are followed by other parameters. If you want to omit a parameter in the middle of a string it must be replaced by a comma. See also example 1.

> • | A parameter value enclosed in square brackets represents the value that will be used if an optional parameter is omitted. See also example 2.

> • | When the parameter is a character string, e.g. <text> or <number>, the string must be enclosed in quotation marks, e.g. "Charlie Brown" or "+49030xxxx". Symbols in quotation marks will be recognized as strings.

> • | All spaces will be ignored when using strings without quotaton marks.

> • | It is possible to omit the leading zeros of strings which represent numbers.

> • | If an optional parameter of a V.250 command is omitted, its value is assumed to be 0.

> Example 1: Omitting parameters in the middle of a string

> AT+CCUG? | Query current setting
> +CCUG: 1,10,1
> OK
> AT+CCUG=,9 | Set only the middle parameter
> OK
> AT+CCUG? | Query new setting
> +CCUG: 1,9,1
> OK

> Example 2: Using default parameter values for optional parameters

> AT+CFUN=7,0 | Activate CYCLIC SLEEP mode, don't reset ME
> OK
> AT+CFUN? | Query ME mode
> +CFUN: 7
> OK
> AT+CFUN= | Set ME back to normal (default parameters: 1,0)
> OK
> +CFUN: 1
> OK