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Customs Over The Horizon Enforcement Network

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Revision as of 17:34, 29 January 2006 by Blantonl (talk | contribs)
COTHEN Badge

The Customs Over The Horizon Enforcement Network (COTHEN) uses a Rockwell/Collins ALE (Automatic Link Establishment) protocol to connect users to each other over the HF spectrum. If you listen to frequencies in use on the COTHEN network, you will hear the ALE sounding calls which units periodically and automatically initiate to determine the best frequency to use for calls to other units.

COTHEN Network Frequencies

Frequency (Khz) Mode
---------------------------
5732.0		USB
7527.0		USB
 8912.0		USB
10242.0		USB
11494.0		USB
13907.0		USB
15867.0		USB
18594.0		USB
20890.0		USB
23214.0		USB
25350.0		USB
COTHEN Terminal

The COTHEN network now uses the MIL-STD 188-141A protocol. It formally used the FED-STD-1045A ALE protocol, developed by Rockwell Collins. The FED-STD protocol is Rockwell Collins proprietary and goes by the tradename Selscan. Selscan is no longer actively used by the COTHEN network.

Note: 8912 is also used by the HFDL (HF Datalink - also referred to as HF ACARS) net, particularly out of Riverhead NY, and is the source of other digital data heard here

COTHEN Transmitter Locations

Albuquerque, NM			35º 05' 02" N	105º 34' 23" W
Arecibo, PR			18º 17' 26" N	66º 22' 33" W
Atlanta, GA			32º 33' 06" N	84º 23' 35" W
Beaufort, SC			34º 34' 22" N	76º 09' 48" W
Cape Charles, VA		37º 05' 37" N	75º 58' 06" W
Cedar Rapids, IA		42º 00' 09" N	91º 17' 39" W
Denver, CO			39º 15' 45" N	103º 34' 23" W
Fort Myers, FL			81º 31' 20" N	26º 20' 01" W
Kansas City, MO			38º 22' 10" N	93º 21' 48" W
Las Vegas, NV			36º 21' 15" N	114º 17' 33" W
Lovelock, NV			40º 03' 07" N	118º 18' 56" W
Memphis, TN			34º 21' 57" N	90º 02' 43" W
Miami, FL			25º 46' 20" N	80º 28' 48" W
Morehead City, NC		34º 34' 50" N	78º 13' 59" W
Oklahoma City, OK		34º 30' 52" N	97º 30' 52" W
Orlando, FL			28º 31' 30" N	80º 48' 58" W
Reno, NV			38º 31' 12" N	119º 14' 37" W
Sarasota, FL			27º 12' 41" N	81º 31' 20" W
Wilmington, NC			34º 29' 24" N	78º 04' 31" W

ALE Call IDs (Base)

CRB	CBP AMOC Caribbean Regional Communications Node
CS1	COTHEN Remote Atlanta, GA used frequently by TSC, voice call "SERVICE ENTER"
CS2	COTHEN Remote Memphis, TN 
CS3	COTHEN Remote Oklahoma City, OK 
CS4	COTHEN Remote Lovelock, NV 
CS5	COTHEN Remote Wilmington, NC 
CS6	COTHEN Remote Kansas City, MO 
CS7	COTHEN Remote Denver, CO 
CS8	COTHEN Remote Albuquerque, NM   
CS9	COTHEN Remote Beaufort, SC often used by OPBAT voice call 
       "PANTHER" and by toms Surveillance Support Center,  Jacksonville 
       voice call "JACKKNIFE"
EST    CBP AMOC Eastern Region Communication Node
OPB    OPBAT Service Center, Nassau, Bahamas, voice call "PANTHER". Also used as
       a remote by HAMMER.
PNR400 OPBAT base, Georgetown, Bahamas
TSC    CBP Orlando, FL Customs National Law Enforcement Communications 
       Center -- Technical Service Center 
WST    CBP AMOC Western Region Communication Node
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