Full interoperability with IP-PBXs, Softswitches & SIP-Based Envrionments
Analog VoIP Gateways
Grandstream Gateways enable businesses to create seamless office environments, integrate traditional phone systems into a VoIP network and efficiently manage communication costs. The GXW Series is designed for full interoperability with leading IP-PBXs, Softswitches and most SIP-based environments.

HT841/HT881
The HT841/881 FXO gateway series enables businesses of all sizes to create an easy-to-deploy VoIP solution. These FXO gateways offer the ability to seamlessly connect multiple locations and all devices within an office to any hosted or on premise IP PBX network to make deployments as easy as possible.
Analog FXO Gateway
- Supports 3 SIP profiles through 1 FXS port and 4/8 FXO ports
- High-performance NAT router
- Lifeline support (FXS port will be hard-relayed to FXO port) in case of a power outage
- 3-way voice conferencing per port
- Automated & secure provisioning options using TR069
- Supports T.38 Fax for reliable Fax-over-IP
- Failover SIP server automatically switches to secondary server if the main server loses connection
- Strong AES encryption with security certificate per unit

GXW4200 Series
The GXW4200 v2 high-density FXS gateway series enables businesses of all sizes to create a cost-effective hybrid IP and analog telephone system that offers the benefits of VoIP communications and takes advantage of Gigabit speeds
High-Density, Gigabit Gateways
- 16/24/32 FXS ports, GXW4248 includes 2 50-pin Telco connectors
- 1 Gigabit network port
- 132x48 backlit graphic display with support for multiples languages
- 4 SIP server profiles per system, independent SIP account per port
- Designed and tested for full interoperability with leading IP-PBXs, soft-switches and SIP-based environments
- Advanced security protection with SRTP/TLS/HTTPS
- Supports 16KHz wide-band voice sampling rate and wide-band codecs such as Opus and G.722
- Carrier-grade security features including secure boot, unique certificate and random default password per device, dual firmware images
- Supports simultaneous 3-way voice conferencing per port
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