INT 21 - TopWare Network OS v5.10+ - END ACCESS TO SPECIFIC PACKET TYPE         
	AX = FFE3h
	DL = 01h
	BX = handle returned by AX=FFE3h/DL=00h
Return: CF clear if successful
	CF set on error
	    DH = error code (01h,11h) (see #02541)
Note:	the specified access handle will no longer be valid after this call
SeeAlso: AX=FFE3h/DL=00h