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10-5 Relay. Relay (To) Relay 10-6 Busy. Busy, stand by Busy -Stand by unless urgent Busy Busy 10-7 Out of service. Out of service (Give location and/or telephone number) Out of Service Out at ... Out of Service 10-7 A — Not Available 10-7 B Off Radio 10-8 In service. In Service Clear In Service 10-9 Repeat, conditions bad. Repeat Say Again 10-10
Examples of police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or other status codes. These code types may be used in the same sentence to describe specific aspects of a situation. Codes vary by state, county, and agency.
10-70 A fire. 10-77/10-double-7 No or negative, often said with intensity. 10-100 Restroom break. 10-200 Police needed at _____. (In the trucking-themed movie Smokey and the Bandit, a character jokingly plays off this usage, saying that 10-100 is better than 10-200, meaning that 10-100 was peeing and 10-200 was doing a #2). 20
Radiotelephony procedure (also on-air protocol and voice procedure) includes various techniques used to clarify, simplify and standardize spoken communications over two-way radios, in use by the armed forces, in civil aviation, police and fire dispatching systems, citizens' band radio (CB), and amateur radio.
Typical walkie-talkies resemble a telephone handset, with a speaker built into one end and a microphone in the other (in some devices the speaker also is used as the microphone) and an antenna mounted on the top of the unit. They are held up to the face to talk. A walkie-talkie is a half-duplex communication device. Multiple walkie-talkies use ...
No voice transmissions are permitted. It has six channels in the 27 MHz band. Five are unused 10 kHz CB assignments between channels 3–4, 7–8, 11–12, 15–16 and 19–20, and the sixth is shared with Channel 23. R/C transmitters may use up to 4 watts on the first five channels and 25 watts on the last, 27.255 MHz.
Walkie-talkies are limited to 10 mW in the 420, 421, and 422 MHz bands. Simplex: 422.2000–422.3000 MHz (Leisure use), 10 mW, 9 channels, 12.5 kHz spacing;
[10] An example of a half-duplex system is a two-party system such as a walkie-talkie, wherein one must say "over" or another previously designated keyword to indicate the end of transmission, to ensure that only one party transmits at a time. A good analogy for a half-duplex system would be a one-lane road that allows two-way traffic, traffic ...