SMDS_CHA.TXT  IP over Switched Megabit Data Service (smds) 
SMDS_MI0.TXT  IP over Switched Megabit Data Service (smds) 
SMDS_MI1.TXT  IP over Switched Megabit Data Service (smds) 
SMDS_MI2.TXT  IP over Switched Megabit Data Service (smds)