Description
Need to keep using your existing analog phones, fax machines, or POS terminals while moving to a modern SIP VoIP system? The Fanvil GA100-4 makes that transition effortless. With four FXS ports and support for four concurrent calls, it lets small businesses and branch offices connect legacy equipment directly to any SIP-based PBX or cloud platform—without ripping out wires or buying new phones. Compact, stable, and packed with practical features like polarity reversal and hardware echo cancellation, it delivers crystal-clear calls and reliable fax transmission every single day.
The Telecom Spot Take
The GA100-4 is the no-fuss bridge between old-school analog gear and today’s VoIP networks. It’s built specifically for scenarios where you still need fax machines in accounting, analog phones at reception desks, or POS terminals in retail—yet you want the cost savings and flexibility of SIP trunks. With dual 10/100 Ethernet ports and easy web-based management, setup takes minutes instead of hours. Our customers love how it eliminates the need to replace perfectly good analog devices while unlocking advanced call features like three-way conferencing and call transfer. If you’re running a branch office, small call center, or hybrid setup, this gateway gives you rock-solid performance at a price that makes perfect business sense.
Key Features
- Four FXS ports let you connect four analog phones, fax machines, or POS terminals at once—ideal for small offices that still rely on legacy equipment.
- Four concurrent calls mean everyone can talk (or fax) simultaneously without busy signals or dropped connections.
- Dual 10/100 Mbps Ethernet ports provide flexible networking and redundancy options for reliable uptime in busy environments.
- Hardware echo cancellation (AEC) ensures crystal-clear voice quality even on challenging lines—your customers and staff will notice the difference immediately.
- Polarity reversal support on FXS ports improves compatibility with older fax machines and billing systems for smoother, more reliable transmissions.
- SIP/IMS and VPN client support plus IPv4/IPv6 and SRTP security keeps your calls protected and works with virtually any hosted PBX or on-premise system.
- Easy management through web GUI, auto-provisioning, TR-069, SNMP, and syslog—perfect for IT teams who need quick configuration and remote monitoring.
- Compact and tough design with lightning protection (Level 4) and a reset button that restores factory settings in seconds.
Technical Specifications
| Category | Details |
|---|---|
| FXS Ports | 4 × RJ11 FXS ports (supports polarity reversal, group/round-robin ringing) |
| Concurrent Calls | 4 simultaneous calls |
| Ethernet Ports | 2 × 10/100 Mbps (Fast Ethernet) |
| USB Port | 1 × Mini USB |
| Protocols | SIP/IMS, VPN client, IPv4/IPv6, firewall, SRTP |
| Codecs | G.711a/u, G.723, G.729A/B, iLBC, AMR; DTMF in-band/out-band |
| Call Features | Caller ID (FSK/DTMF), call transfer, call waiting, call forward, DND, 3-way conference, auto-dial, hook flash, fax passthrough |
| Management | Web GUI, TR-069, SNMP, auto provisioning, syslog, firmware upgrade, multi-language (including English) |
| Physical | Dimensions: 140 × 30 × 100 mm; Weight: 0.2 kg |
| Power & Environment | Lightning protection (Level 4); Operating temperature: 0–45°C |
Frequently Asked Questions
What exactly is an FXS VoIP gateway?
An FXS port provides the dial tone and ring voltage that traditional analog phones and fax machines expect. The GA100-4 turns those analog signals into SIP VoIP so you can use your existing devices on any modern phone system.
How many phones or faxes can I connect at the same time?
You can connect up to four analog devices and support four simultaneous calls or fax sessions—plenty for most small offices, reception areas, or retail counters.
Does it support fax machines?
Yes—full fax passthrough with polarity reversal ensures reliable transmissions even on older equipment.
Is it easy to set up with my existing PBX or cloud provider?
It works with any standard SIP platform, offers web-based configuration, and supports auto-provisioning so IT teams can deploy it quickly.
What kind of network does it need?
Just a standard Ethernet connection—dual 10/100 ports give you flexibility and backup options without needing expensive switches.
Will it work in my small office or branch location?
Yes! Its compact size, low power use, and lightning protection make it perfect for desks, wiring closets, or remote sites where space and reliability matter.


