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Communications Technology Index


Usering Radios Safety About Freqenceys Radio Modulation Systems Signal Propagation Radio Procedures


Continuous Tone-Coded Squelch System (CTCSS)/ Private Line (PL)/ Sub tone/ Sub Channel Digital-Coded Squelch (DCS) Dual Tone Multi Frequency (DTMF) Land Line Phone Systems Mobile Phone Systems Sat Phone Systems Repeters SelCall Voltage standing wave ratio (VSWR) Global Positioning System (GPS) SPOT'S GPS Trakers HF Services


Internet Repeater Linking Project (IRLP) Automated Packet Reporting System (APRS) Broadband-Hamnet 27Mhz HF CB 27Mhz Marine CB UHF CB EPIRB’S and PLB’S Navigation GPS Vehicle GPS Marine GPS Navigation GPS Vehicle GPS Marine GPS Spot Personal Tracker SPOT Satellite GPS Messenger SPOT Connect

Communicasions Services/ Users of Communicasons Servcies

Radtel HF OZ VKS737 RFDS