Fixed VoIP to GSM/3G-FXO-FXS Voice Gateways



SETU VGFX is a single-box gateway solution for any legacy system or an IP-PBX. It offers seamless connectivity between IP, GSM/3G and POTS (FXO and FXS) networks. Organizations can place calls using preferred networks to lower communication cost and avoid higher interconnection charges.

GSM/3G trunking not only saves on mobile call charges but also allows unique applications to be created. Organizations can have virtually free calling between office and field employees using the corporate CUG plans.

SETU VGFX easily fits into any existing data infrastructure and allows low-cost long distance calling through SIP trunking. Organization can connect multiple branch offices over the WAN internet for cost-effective internal calling.


GSM/3G – VoIP Gateway for Traditional PBX

GSM/3G – VoIP Gateway for Traditional PBX

  • Multiple network connectivity on a single platform
  • VoIP access to traditional analog systems
  • Save on recurring fixed-to-mobile call costs
  • Retain dialing habits and patterns
  • Compatible with all TDM PBX

GSM/3G –POTS Access for IP-PBX

  • Place calls over GSM/3G or POTS from existing IP terminals
  • Seamless integration with existing LAN/WAN infrastructure
  • Deployable in all SIP based VoIP networks
  • Cost-effective calling with advanced routing logics
  • Lower CAPEX and early ROI
GSM/3G –POTS Access for IP-PBX

Peer-to-Peer Calling

Peer-to-Peer Calling

  • Communicate with dispersed offices at minimum call costs
  • Replace expensive Tie lines with cost-effective IP network for inter-office communication
  • Make direct IP calls without involving SIP Server
  • Eliminate carrier charges associated with proxy calling
  • Dial by extension numbers between distant locations

Key Features

  • Multiple GSM/3G SIM support
  • Make and receive calls from/to analog terminals over the cellular and IP networks
  • Quad-Band GSM and Tri-Band 3G network operation
  • Open standard SIP support
  • Multiple SIP proxy registrations
  • Restrict unwanted calls with list of denied numbers
  • Direct number dialing on the cellular networks with automatic number translation
  • Caller ID presentation/restriction
  • Fax over IP (T.38 and PSTN Pass-Through)
  • Emergency number dialing
  • Hotline extension setting
  • SIM balance inquiry and recharge from web-based GUI
  • SNMP Monitoring
  • Message Wait Indication
  • Port Forwarding and DMZ
  • TR-069 Auto-Configuration
  • VoIP Security over SRTP/TLS Encryption
  • Web based configuration and management



SETU VGFX8422 Gateway with 8 VoIP Channels, 4 GSM SIMs, 2 FXO and 2 FXS Ports
SETU VGFX8422 3G Gateway with 8 VoIP Channels, 4 3G SIMs, 2 FXO and 2 FXS Ports
SETU VGFX8404 Gateway with 8 VoIP Channels, 4 GSM SIMs and 4 FXS Ports
SETU VGFX8404 3G Gateway with 8 VoIP Channels, 4 3G SIMs and 4 FXS Ports

VoIP Port:

Protocol SIPv2, SDP, RTP (RFC 2833)
Connector RJ45
SIP Accounts Up to 9
Echo Cancellation G.168 with up to 128ms Tail length
Voice Codecs G.711 (A/µ Law), G.723.1, G.729AB, GSM-FR and iLBC

Mobile Port:

GSM/3G SIM Cards Up to 4
Frequency Bands Quad-Band GSM850, EGSM900, DCS1800, PCS1900
Tri-Band WCDMA 850/1900/2100 MHz or Tri-Band WCDMA 900/1900/2100 MHz
SIM Interface 1.8, 3V SIM Interface
Compliance ETSI GSM Phase2/2+

FXO Port:

Connector RJ11
Dialing and Reception DTMF and Pulse Dialing
CLIP DTMF, FSK ITU-T V.23 and FSK Bellcore 202A CLI

FXS Port:

Connector RJ11
Dialing and Reception Pulse and DTMF Dialing
CLIP DTMF and FSK CLI Presentation
Answering and Disconnect Signaling Polarity Reversal for call connect/disconnect signaling

Power Supply:

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


Dimensions 23.0 x5.5 x 16.3 cm (9.1”x 2.2”x 6.4”)
Mounting Options Wall Mount and Table Top
Operating Temperature 0°C to +55°C (34°F to +131°F)