Int 14 Fn ED - Telapi - "telpoll" - Poll Telnet Session For Connection C [N]
AH = EDh
BX = connection ID (see AH=ECh)
Return: AX = status (0000h,0001h,FFFFh,etc.) (see also #0323)
0000h session now connected
0001h connection still in progress
Note: this function is not supported by the Microdyne TelAPI v3.7
See Also: AH=EDh,AX=FF00h