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• Wireline Access
• Wireless Access
• Wireless Transmission
• Full-Service Content Delivery Network
• Terminal Devices
• Public Phones
  • Cardphones
    • MUST400
    • INT 100
    • INT 200
    • INT 200 GSM
  • Line Unit
    • LU 300
  • Phone Booths
  • Infokiosk / Webphone
    • Dolphin
• Network Management Systems

Line Unit LU 300

The Line Unit is a device, placed in the telephone exchange site and connected in series with the cardphone line. It provides detection of the debiting criterion of the telephone exchange, either as DC pulse or as 12/16KHz pulse, and generation of the 12/16KHz debiting pulses towards the cardphone. Furthermore, in case an ordinary telephone is connected in parallel or in series with the cardphone line, the Line Unit detects the fraud attempt and releases the call

Features

• Single Eurocard dimensions mounted on 19" Euro subrack
• 14 LU 300 per subrack
• Continuous antifraud protocol in DOV
• Powered from the telephone exchange battery (-48 to -60 VDC)

• Debiting pulse regeneration (12/16KHz)
• DC debiting signal detection
• Cardphone line power booster option (adds 18V on the loop voltage