INT 14 - TelAPI - "telnblkopen" - CREATE TELNET CONNECTION (NON-BLOCKING)
	AH = ECh
	BX = port number to connect with (default 0017h used if <= 0)
	CX:DX = Internet address of remote host
	DS:DI -> 2-byte remote host (connection) identifier
	ES:SI -> 1700-byte buffer for Telnet state record
	    0000h:0000h to use TelAPI internally-allocated space
Return: AX = status (0000h-0009h,FED3h,FF37h,FFBDh,FFC0h,FFCDh) (see #00397)
	ES:SI buffer filled with state record
	ES:SI -> internally-allocated state record in some versions
Notes:	the remote host identifier may be used to refer to this connection
	this function returns immediately; use AH=EDh to check whether the
	  connection has been established yet
	this function is not supported by the Microdyne TelAPI v3.7
SeeAlso: AH=E0h"TelAPI",AH=EDh,AX=FF00h