GSM Gateways
Topic 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
