` U.S. Secret Service Channel I.D. Frequency Usage ------------ --------- ----- Able 32.230 WHCA vans Alpha 166.5125 Escort & Security Baker 165.7875 Pres./VP/VIP escorts Charlie 165.375 Nationwide primary, Command post coordination Delta 169.925 WHCA vans, phone patches Echo 407.850 Phone patch uplink, paired with 415.700 in aircraft Foxtrot 415.700 Phone patch downlink, paired with 407.850 on ground Golf 165.7625 Input to 165.375 rptr Hotel 166.2125 Pres/VP protection India 407.925 Treasury Security Force(Pres/VP protecion) Juliet 170.000 Camp David pager Kilo 167.825 WHCA Staff Lima 168.7875 WHCA Staff Mike 165.2125 Foreign/Domestic dignitaries protection November 167.025 WHCA Staff Oscar 164.8875 Pres limo & Executive family Papa 164.400 Counterfeit division, Pres/VP protection Quebec 166.700 WHCA Staff Romeo 166.400 Input to 166.4625 rptr Sierra 166.5125 Pres/VP protection; Pagers Tango 164.650 Pres/VP protection Uniform Victor 164.100 Pres/VP protection Whiskey 167.025 Pagers X-Ray 166.4625 Treasury Common channel (S.S./ATF/Customs/IRS) Yankee 162.6875 Phone patch uplink, paired with 171.2875 in Aircraft Zulu 171.2875 Phone patch downlink, paired with 162.7875 ground Misc info on Secret Service & Presidential related Frequencies -------------------------------- White House Communications Agency (WHCA) 5 channel configuration ----------------------- Simplex F-1 165.7875, "Baker" Simplex F-2 165.375, "Charlie" Simplex F-3 166.2125, "Mike" Simplex F-4 164.650, "Tango" Simplex F-5 164.8875, "Oscar", White House Staff F-1 thru F-4 handle 90% of Secret Service radio traffic throughout the country. 3 Channel configuration ----------------------- F-1 166.5125, "Sierra", Usually a staff/command post, Primary F-2 167.025, "Whiskey", Mostly paging & some 2 way traffic for support Personnel. F-3 166.700, "November", Used usually in advance of a VIP's arrival "Suitcase repeater", (portable setup), packed in large suitcases containing the B/C/M/T configuration, in the "C" frequency uses a rptr with 166.400 providing the usual input "Y/Z" configuration: These were part of a still used system providing telephone system from aircraft near the arrival site or from limousines. This system utilizes the frequency pair 162.6875 & 171.2875. Formerly it was always a duplex system but occasionally heard as a repeater (similiar) to the civilan mobilephone systems). The system is known by both names "Y/Z" or "Yankee/Zulu"