INT 17 - Shamrock Software NET.24 v3.11+ - TRANSMIT SINGLE CHARACTER TO REMOTE  
	AX = 240Bh
	DL = character to send
Return: AL = status (see also AX=2400h)
	    03h transmission error
	    06h write error
SeeAlso: AX=2407h,AX=240Ah,AX=240Ch