SIMADO GFX44 is a fixed configuration GSM/3G-FXS voice Gateway. It connects with the existing telephony devices via FXS interface. Up to four SIM cards can be placed inside the SIMADO GFX44 Gateway, allowing a user to make up to four concurrent calls. The calls to mobile numbers are placed via the GSM/3G SIM cards, reducing higher fixed-to-mobile interconnection charges. The Gateway serves as an ideal solution for business organizations, remote project sites with limited fixed-line connectivity and temporary office set-ups.


GSM/3G Trunking for Legacy Phone System

GSM/3G Trunking for Legacy Phone System

  • Make Mobile Calls from Existing Telephone Instruments
  • Easy Integration with Existing Telephony Interfaces and Devices
  • Automated Call Route Selection based on Least Cost Algorithms
  • Fixed-line Alternate/Backup for Remote Office Sites and Call Shops


  • Up to Four GSM/3G SIM support
  • Single Antenna for Four GSM SIMs
  • Quad-band GSM Network Operation
  • Tri-band 3G Network Operation
  • Time/Number based Call Routing
  • Direct Number Dialling on the Cellular Networks with Automatic Number Translation
  • Restrict Unwanted Calls with a List of Denied Numbers
  • CPC Signalling to Prevent Port Blockages and Accurate Billing
  • Caller ID Presentation on Analog Phones
  • Hotline Extension Setting
  • Emergency Number Dialling on GSM/3G Networks, Dial Emergency Numbers even in the Absence of SIM
  • Easy Programming Interface


SIMADO GFX44 GSM to Analog Voice Gateway with Four GSM SIM and Four FXS Ports
SIMADO GFX44 3G 3G to Analog Voice Gateway with Four 3G SIM and Four FXS Ports

Mobile Port:
Frequency Bands Quad-band GSM850, EGSM900, DCS1800, PCS1900
Tri-band WCDMA 850/1900/2100 MHz or Tri-band
WCDMA 900/1900/2100 MHz
Compliance ETSI GSM Phase2/2+
SIM Interface 1.8, 3V SIM Interface
Antenna 1.8/2.5 *dBi, 50, SMA (Male) Connector,
Fixed Omni Directional Swivel Antenna1.8/3.0 *dBi, 50, SMA (Male) Connector,
Omni Directional with a Cable Three Meters Long

FXS Port:
Physical Connector RJ11
Dialling DTMF and Pulse (10/20PPS)
CLI Presentation DTMF, FSK ITU-T V.23 and FSK Bellcore 202A CLI
Call Maturity Polarity Reversal

Power Supply:
Input External Power Adaptor
Input: 90-265VAC, 47-63Hz
Output: 12VDC@2A
Power Consumption 8W (Typical)

Dimensions (WxHxD) 23.1 X 5.5 X 16.2 cm (9.09”x2.16”x6.37”)
Unit Weight 1.00 kg (2.21 lbs) Approx.
Shipping Weight 1.83 kg (4.03 lbs) Approx.
Mounting Options Wall Mount and Table Top

Operating Temperature 0° C to +45° C (32° F to +113° F)
Storage Temperature -20° C to +70° C (-4° F to +158° F)
Operating Humidity 5-95% RH (Non-condensing)
Storage Humidity 0-95% RH (Non-condensing) at 40° C

Regulatory Compliances:
IEC 60950-1, RoHS, FCC Part15, CE