n is either 1 (true) or 0 (false). The default value is 0.
On output, a Telnet network virtual terminal (NVT) performs the following default end-of-line behavior: either issues a carriage return character (CR) followed by a linefeed character (LF), or issues a CR followed by NUL (if no LF is issued). TelnetNUL affects the issuance of the NUL character in the second case. When TelnetNul is enabled (n = 1), the Telnet virtual terminal suppresses the NUL character.
This setting applies only to Windows systems; it is ignored on UNIX®, and Linux configurations, in which Telnet is supplied by the operating system vendor.
Changing This Parameter
On the Compatibility page of the Management Portal (System Administration > Configuration > Additional Settings > Compatibility), in the TelnetNUL row, click Edit. Select TelnetNUL to enable this setting.
To change this parameter for a single process only (as opposed to instance-wide), use the TelnetNUL()Opens in a new tab method of the %SYSTEM.ProcessOpens in a new tab class. See the class reference for details.