Fixed GSM/3G to Analog Voice Gateway



SIMADO GFX44 is a fixed configuration GSM/3G-FXS voice gateway. It connects with the existing telephony devices via FXS interface. Up to 4 SIM cards can be placed inside the SIMADO GFX44 gateway allowing up to 4 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/back-up for remote office sites and call-shops

Key Features

  • Up to 4 GSM/3G SIM support
  • Single Antenna for 4 GSM SIMs
  • Quad-Band GSM network operation
  • Tri-Band 3G network operation
  • Time/number based call routing
  • Direct number dialing on the cellular networks with automatic number translation
  • Restrict unwanted calls with list of denied numbers
  • CPC signaling to prevent port blockages and accurate billing
  • Caller ID presentation on analog phones
  • Hotline extension setting
  • Emergency number dialing on GSM/3G networks, dial emergency numbers even in the absence of SIM
  • Easy programming interface



SIMADO GFX44 GSM to Analog Voice Gateway with 4 GSM SIM and 4 FXS Ports
SIMADO GFX44 3G 3G to Analog Voice Gateway with 4 3G SIM and 4 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 cable of 3meters Length

FXS Port:

Physical Connector RJ11
Dialing 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) 15.5 x 22.0 x 4.95cm (6.10”x8.66”x1.95”)
Unit Weight 1.00kg (2.21lbs) Approx.
Shipping Weight 2.50kg (5.5 lbs) Approx.
Mounting Options Wall Mount and Table Top


Operating Temperature -10° C to +50° C (14° F to +122° F)
Storage Temperature -40° C to +85° C (-40° F to +185° 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