SR-20C

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SR-20C Point-to-Point Radiotelephone Link

TelePoint’s SR-20C is a UHF/VHF single-line point-to-point radiotelephone link designed to provide affordable yet high-quality telephone service to rural subscribers. It acts as a full-duplex line extender providing telephone, fax, and internet service to locations difficult or impossible to access by wire lines. Examples include offshore platforms, islands, mountainous areas, and farmlands. A system consists of two units, Base and Subscriber.

The Base unit is typically located where a CO (exchange) line is available. The Subscriber unit is located a long distance away where phone, fax, or modem service is needed. Antennas are connected to both units to establish a radio link between them.

STANDARD FEATURES

  • Range up to 60 miles (100 kilometers).
  • Nearly any RF frequency pair may be chosen in the standard bands of 136-174, 400-430, or 450-490MHz. Frequencies in many other bands are also available.
  • Transmit power up to 50W for VHF and 40W for UHF.
  • Channel spacing is 25kHz (standard) or 12.5kHz (optional).
  • Dial-up internet connection speeds of 19.2kbps can normally be obtained.
  • Fax: rates to 14.4kbps
  • Subaudible tones (CTCSS) guard against activation by outside signals.
  • RF modules by Kenwood.
  • Excellent audio quality – compandors eliminate radio hiss.
  • Compatible with DTMF or pulse-dial exchanges.
  • Intercom calls can be made between the Subscriber and a phone connected directly to the Base unit.
  • Hook switch flash is transmitted through system
  • Changes to most settings can be done with a standard telephone.
  • Residences and other places where an added cellular line is less costly than a landline
  • Wireless local loop

SR-20C User’s Manual

SR-20C Technical Specifications

SR-20C Product Brochure

 

AVAILABLE CONFIGURATIONS

  • Loop-start (ordinary phone service)
  • Lease line replacement (2 or 4 wire)
  • 2 or 4-wire E&M
  • Service to mobiles/portables (enables phone calls over mobile and portable radios)
  • Telephone-to-telephone (hotline)

AVAILABLE OPTIONS

  • Voice privacy scramblers
  • Ability to easily select among multiple pre-programmed frequencies of your choice
  • PC-based programming software enables changes to frequency and transmit power
  • Full-duplex repeaters to extend coverage
  • Compatibility with Caller-ID
  • Polarity-reversal for pay-phone operation
  • Subscriber Pulse Metering (SPM) for pay-phone operation
  • Compatibility with magneto phones and exchanges

AVAILABLE ACCESSORIES

  • Power supplies: 115 or 230VAC, 50 or 60Hz, switchable
  • Uninterruptible (battery-backed) power supplies
  • Solar power
  • Yagi antennas for fixed installations (any required gain)
  • Omnidirectional antennas for mobile installations
  • Antenna cables with connectors (any required length)
  • Lightning and surge protectors for antenna and phone lines
  • TX combiners and RX multicouplers to allow antenna sharing by multiple SR-20C units