Trying to identify this box on the outside of my house
If this is somewhat new construction, these might be anti-pest defense tubes. The exterior box resembles "Tubes in the Wall" pest defense system. Liquid pesticide is shot via CO2 at the exterior junction box and the liquid will travel throughout the house by means of the tubes. 

http://www.pestdefense.com/taexx is an example of this sort of system.



Further Readings:

Tubes in the Wall