INT 14 - TelAPI - "tellist" - GET TELNET SESSION LIST
	AH = E7h
	ES:SI -> 10-word buffer for session list
Return: AX = 0000h (successful)
	ES:SI buffer filled
Desc:	determine, for each of the ten allowable sessions, whether the session
	  is currently available
Note:	each word in the buffer is filled with either 0000h to indicate that
	 the corresponding sesion is unavailable, or 0001h if available
SeeAlso: AH=E0h,AH=E5h,AX=FF00h