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GSM Gateway Description

Main functions of SC-855: Conversion of wire & wireless communication Auto-select economic route Code Conversion Setting: Through the connection towards local PSTN line, the phone calls with proceed with code-transfer dialing process Set the Allow-to-Dial Code Set GSM dial-out code amount Polarity reversing function Definition of DTMF reversing signal Limit of communicating time Set up GSM extra dialing local-code Set up extra dialing local-code to PSTN GSM simulated echo-bell-sound function GSM isn ready, call will be forced to dial out from PSTN Setting of Specific Call-Transfer: PSTN TO GSM, GSM TO PSTN, GSM call-Transfer setting time to PSTN, DTMF definition of reversed signal Specification: Phone Impedance: Below DC 1K Phone Ring Output Voltage: 45V rms. Phone Signal (DTMF) Standard: -3dbm~-24dbm. Phone Signal (DTMF) Time: 50~100ms. DTMF Frequency Rate Error:+1% GSM Specification: GSM Frequency bands: Dual Band EGSM 900 and GSM 1800 (GSM Phase 2+) GSM class: Small MS Transmit power. Class 4(2W) for EGSM 900 Class 1(1W) for GSM 1800 SIM card reader. External-connected via interface connector Antenna:50 Ohm antenna coaxial connector Temperature range: Normal operation:-20℃ and +55℃ Restricted operation:-25℃ to -20℃ and +55℃ to +70℃ Storage: -40℃ to +85℃

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