INTERNAL FREQ'S USED BY THE PHONE COMPANY (BLUE BOX)





1 = 700+900        2 = 700+1100

3 = 900+1100       4 = 700+1300

5 = 900+1300       6 = 1100+1300

7 = 700+1500       8 = 900+1500

9 = 1100+1500      0 = 1300+1500



ADDITIONAL SIGNALS REQUIRED FOR BLUE BOX



KP = 1100+1700 (KEY PULSE)



ST = 1500+1700 (START)



DISCONNECT = 2600



ALL FREQ'S ARE IN HZ.



(Pause)...More(y/n/ns)? ns




US ARMY FREQUENCIES





1 = 2100+2300



2 = 2300+2500



3 = 1900+2700



4 = 1900+2100



5 = 2500+2700



6 = 2300+2700



7 = 2100+2500



8 = 1900+2300



9 = 2100+2700



0 = 1900+2500



ALL FREQS ARE IN HZ.







US. AIR FORCE FREQUENCIES





1 = 1020+1620



2 = 1020+1740



3 = 1020+1860



4 = 1140+1620



5 = 1140+1740



6 = 1140+1860



7 = 1260+1620



8 = 1260+1740



9 = 1260+1860



0 = 1380+1740