Topic GSM Gateway with battery back-up

GSM Gateway (with battery back-up)
  • Quad band 850/900/1800 /1900 MHz auto compatible.
  • RJ-11 socket for easy interface with any kinds of terminal impedance(suitable for all types of EPABX and PCO machines)
  • DTMF/FSK Caller ID and error message display
  • Speaker/MIC volume adjustable
  • Call diversion/Call waiting/Call comference
  • Enter PIN and change PIN
  • Send DTMF tone signals
  • Voice mail
  • GSM USSD
  • Baby call
  • 12/16Khz billing signal
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