Suppress/issue Telnet NUL at end-of-line for Telnet transmission. If true (1), the Telnet virtual terminal does not issue a NUL character (ASCII 0) following a CR character (ASCII 13) at end-of-line during Telnet transmission. On output, a Telnet network virtual terminal (NVT) performs the following default end-of-line behavior: either issues a CR followed by an LF (carriage return character followed by a linefeed character), or issues a CR followed by NUL (if no LF is issued). The TelnetNUL setting affects the issuance of the NUL character in the second case. The value n may be 1 or 0
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.
When 1 (true) TelnetNUL suppresses (does not issue) a NUL character at end-of-line.
When 0 (false) TelnetNUL issues a NUL character at end-of-line. Default.
0 or 1. The default is 0.
On the page System Administration > Configuration > Additional Settings > Compatibility, in the TelnetNUL row, select Edit. Choose true (selected) or false (cleared).