type:  u32
default:  23
help: Port for TELNET service

val_help: u32:1-65535; Numeric IP port
syntax:expression: $VAR(@) > 0 && $VAR(@) <= 65535 ; \
	"Port number must be in range 1 to 65535"
commit:expression: exec "sudo /opt/vyatta/sbin/is_port_available.pl $VAR(@)"; \
        "Port $VAR(@) is already in use!"