INT 14 - TelAPI - "telread" - BUFFERED READ
	AH = E2h
	BX = connection ID (see AH=E0h"TelAPI")
	CX = length of buffer in bytes
	ES:SI -> buffer for data
Return: AX > 0000h number of characters actually read
	AX = 0000h host has closed connection
	AX < 0000h error code (see #00397)
Note:	translates CRLF into local EOL if the connection is in ASCII mode,
	  negotiates various Telnet options, and immediately executes several
	  different Telnet action commands
SeeAlso: AH=07h"TelAPI",AH=E3h,AH=E6h,AX=FF00h,INT 6B/AH=01h