Occasionally a trial lawyer will have the need to read 911 transcripts. Certain information, such as caller’s identity, addresss and reason for the emergency call, may come across clearly but other embedded code correspondence may not. This week, we provide you with a list of ten codes – cop lingo for their field activity.
A brief history of ten codes: Ten-codes, properly known as ten signals, are code words used to represent common phrases in voice communication, particularly by law enforcement and in Citizen’s Band (CB) radio transmissions. Ten-codes were developed in the 1940s at a time when police radio channels were limited, to reduce use of speech on the radio. Credit to the originator goes to Charles “Charlie” Hopper. He was the Communications Director at the Illinois State Police, District 10, located in Urbana, Illinois. Hopper was involved in radio for many years and saw a need to abbreviate radio transmissions on State Police bands. The codes were expanded in 1974by the Association of Public Safety Communication Officials (APCO. They have historically been widely used by law enforcement officers in North America.(www.wikipedia.com)
* 10-1 poor reception
* 10-2 good reception
* 10-3 stop transmitting
* 10-4 message received, affirmative, ok
* 10-5 relay this information to ___.
* 10-6 busy
* 10-7 out of service
* 10-8 in service
* 10-9 please repeat your message
* 10-10 negative
* 10-12 standby
* 10-13 civilians present and listening
* 10-15 en route to station with suspect
* 10-18 urgent
* 10-19 return to station
* 10-20 specify location/my location is ___.
* 10-21 place a phone call to ___.
* 10-22 disregard
* 10-23 stand by on this frequency (also “On scene” in some areas)
* 10-27 vehicle registration request
* 10-28 arrests/warrants on driver’s license
* 10-29 arrests/ warrants on the vehicle
* 10-32 gun
* 10-33 emergency traffic follows, hold routine messages
* 10-34 frequency open (cancels 10-33)
* 10-36 what is the correct time of day?
* 10-39 false alarm, premises was occupied
* 10-40 false alarm, no activity, premises appears secure
* 10-41 begin watch
* 10-42 end watch
* 10-45 fueling vehicle
* 10-49 en route to assignment
* 10-50 accident
* 10-51 tow truck needed
* 10-52 ambulance needed
* 10-53 road blocked at ___.
* 10-54 animals on highway
* 10-55 security check
* 10-57 hit-and-run accident
* 10-58 direct traffic
* 10-59 escort
* 10-60 squad in vicinity, lock-out
* 10-61 personnel in area
* 10-62 reply to message
* 10-63 clear to copy info?
* 10-64 message for delivery
* 10-65 net message assignment
* 10-66 net message cancellation
* 10-67 person calling for help
* 10-68 dispatch message
* 10-69 message received
* 10-70 prowler, fire alarm
* 10-71 gun involved, advise nature of fire
* 10-72 shooting, fire progress report
* 10-73 smoke report
* 10-74 negative
* 10-75 in contact with ___.
* 10-76 en route
* 10-77 ETA ___.
* 10-78 need assistance
* 10-79 bomb threat, coroner’s case
* 10-80 bomb has exploded
* 10-81 breathalyzer report
* 10-82 reserve lodging
* 10-83 work school crossing at ___.
* 10-84 if meeting ___, advise ETA
* 10-85 delay due to ___.
* 10-86 officer on-duty
* 10-87 pickup
* 10-88 present phone number of ___.
* 10-89 bomb threat
* 10-90 bank alarm at ___.
* 10-91 pick up prisoner
* 10-92 improperly parked vehicle
* 10-93 blockage
* 10-94 drag racing
* 10-95 prisoner/subject in custody
* 10-96 psych patient
* 10-97 check signal (“On Scene” in CA and other areas)
* 10-98 prison/jail break
* 10-99 wanted/stolen record
* 10-100 dead body
* 10-200 alarm
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