DTN Nasdaq symbol?

["James F. Anderson III" <jamesa98@xxxxxxxxxxxxxxx>]

I've just changed over from BMI cable to DTN satellite.  So far, I am very 
impressed with the quality and speed of DTN's data.  I actually GET quotes 
(and bid/ask) on options now, which is something that rarely happened with 
BMI.  Unfortunately, I have not been able to find a working symbol for the 
NASDAQ composite.  I have tried NCMPX, but I don't get any data.  I would 
really appreciate it if any DTN user could provide me with a good NASDAQ 
composite symbol.  Also, does anyone know of a symbol guide for DTN?

Thanks,
James Anderson