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Radio phone information (walkie-talkie) ( 39 ) :

General information

Directive 1999/5/EC - Directive of 9 March 1999 of the European Parliament and of the Council on Radio Equipment and Telecommunications Terminal Equipment and the mutual recognition of their conformity (1999-04-07 OJ No L 91/10).
Donald L. Hings Inventor & Telecommunications Pioneer Walkie Talkie - The "walkie-talkie" is Don Hings' most well-known invention. The earliest versions of this device were designed as portable field radios for the bush pilots of Consolidated Mining and Smelting (now Cominco), who had to fly their planes between remote sites in the far north of Canada. The first true walkie-talkie was built by Hings in 1937, but it was not called a walkie-talkie at the time.
Handheld Radio Equipment Page - This page attempts to keep track of the array of low power systems available to the public (excluding telephones) such as CB, FRS, GMRS, MURS, SRBR etc.
Personal Radio Services - Services issued in USA by FCC. This is official FCC page on those services.
R&TTE Ditective - As of 2000 april 8th within the European Economic Area (EEA) Radio and Telecommunications Terminal Equipment (R&TTE) is brought under the CE Marking scheme. So far a type approval was required for equipment like telephones, mobiles e.g. DECT, GSM and DCS1800, transmitters like remote controls and the like. Now, like most other equipment, the type approval is replaced by a self certification scheme in accordance to the R&TTE Directive (99/5/EC).
Two Way Radio Directory - A comprehensive directory of Two Way Radio resources with over 1500 links.

Technology

CTCSS (Continuous Tone Coded Squelch System) - CTCSS (Continuous Tone Controlled Squelch System) a sub audible tone in the range of 67 to 254 Hz.
CTCSS, PL, Tone Squelch, and other Necessary Evils
CTCSS? DCS? Sub-channels? - With "tone squelch" the radio receiver can be set to only open its squelch if this tone is received. Any interference would not have the correct tone present, and so the radio would remain quiet. Continuous Tone Coded Squelch System was developed into a system with numerous standard tones to choose from, often 37. Some manufacturers call these "sub-channels". DCS is similar to CTCSS in practice, but uses a digital code instead of continuous analogue tones.
ETSI's forthcoming DIIS standard - New standard proposal for digital radio at PRM446 frequency band

Citizens Band (CB) in USA

CB Radio Net Ring - This is a web ring dedicated to CB Radio Communications.
Citizens Band Radio Service - Citizens Band (CB) Radio Service is a private two-way voice communication service for use in personal and business activities of the general public. Its communications range is from one to five miles.

Citizens Band (CB) in Europe

Introduction to CB Radio

PMR446

CTCSS? DCS? Sub-channels?
Delboy's PMR446 Radio Forum
Euro446 - This page gives you general information PMR446 radio system.
European Radiocommunications Committee on Exemption from Individual Licensing of PMR 446 equipment (ERC/DEC/(98)26)
Information on PMR446 Walkie Talkies - PMR446 is a European standard licence-free radio service.
Licence-Free PMR446 Radio - User perspective introduction to PMR446 radios.
PMR446 Personal Mobile Radio - This PMR446 website is an information guide dedicated to the subject of personal mobile radio. This page has also informationon using PMR446 server network for eQSO, forum engine from the people who brought you internet gateway linking for pmr446
PMR446 Personal Mobile Radio Reviews
PMR446 radio service - This document is an introduction to PMR446 system.
PMR446 Walkie Talkie Radio System - This is a general introduction document.
PMR446 Radio Modifications 1 - Telcom 100 Modulation and Squelch Adjustment, Telcom TE200 Squelch Modification, Binatone 100/Goodmans Tracker Mk1 external antenna connection, Alinco DJ446 Power Adjustment
PMR446 Radio Modifications 2 - TWINTALKER 3000 moduleation adn squelch adjustments, Alan 441 Squelch Adjustment, TEAM TECOM 446 modification for standard UHF handheld band (420 to 470 Mhz), Entel Euro-Wave squelch and modulation adjustment, AUDIOVOX PMR modulation adjustment
Simple Inductive Coupling - This document shows a simple inductive coupler used to improve reception on the PMR446 band.
The "naughty stuff" page... - PMR446 is ideal for UHF radio experiments, without needing an amateur radio license. This page has technical information on PMR446 radio system. This pages has also information on PMR446 antennas.

Family Radio Service (FRS)

Family Radio Service - Official pages from FCC
Family Radio Service (FRS) Page - This page gives yu general information on FRS.

Analogue Trunking Radio Systems

TETRA

TETRA MoU - TErrestrial Trunked RAdio (TETRA) is an open digital standard defined by the European Telecommunications Standards Institute (ETSI). The TETRA Memorandum of Understanding (MoU) represents 85 organisations from 29 countries working with TETRA.
TETRA Summary