Grandstream GXW Series

Series Models	GXW4104/4108 (FXO), GXW4216/4224/4248 (FXS)
Type	Analog VoIP Gateway (FXS or FXO)
Ports	4–8 FXO (connect to PSTN lines) or 16–48 FXS (connect to analog phones/faxes)
Protocols	SIP (RFC3261), IPv4/IPv6, TCP/UDP, HTTP/HTTPS, TFTP
Codecs	G.711 (A/µ), G.722, G.723.1, G.726, G.729A/B, iLBC, T.38 Fax
Fax Support	T.38 Fax Relay over IP; G.711 pass‑through
Network	Dual 10/100 Mbps ports (GXW41xx) or Gigabit ports (GXW42xx)
Voice Features	Echo cancellation (G.168), VAD, CNG, adaptive jitter buffer
Caller ID	Bellcore Type 1 & 2, ETSI, NTT, etc.
Routing	Flexible dial plan, failover, PSTN fallback (on FXO models)
Security	TLS/SRTP, HTTPS, admin access control
Configuration	Web GUI, Telnet, SSH, TR‑069, auto‑provisioning
Mounting	Desktop / wall‑mount; 1U rack‑mount ears (GXW42xx)
Power	External DC adapter (12V); Power over Ethernet available on select models
Warranty	1 Year Manufacturer Warranty

FXO & FXS Options

Choose FXO gateways (GXW4104/4108) to connect analog telephone lines to your VoIP network. Choose FXS gateways (GXW4216/4224/4248) to connect analog phones, fax machines, or legacy PBX extensions.

Seamless Analog to VoIP Integration

Preserve your existing analog devices while upgrading to a modern SIP‑based phone system. The GXW gateways handle all conversion transparently.

Advanced Codec & Call Feature Support

Support for wideband codecs (G.722) and fax (T.38) ensures excellent audio quality and reliable fax transmission. Features like call transfer, hold, and forwarding work across analog and VoIP.

Easy Web GUI Configuration

Set up FXO lines, define dial plans, and manage users through a clean, responsive browser interface. No command‑line knowledge needed.

Works with Analog PBX & Traditional Phones

Connect your old PBX to an IP network, or give a new IP‑PBX analog trunk access. GXW gateways are protocol‑agnostic and work with any SIP platform.

Compatible with Most VoIP Systems

Works seamlessly with Grandstream UCMs, 3CX, Asterisk, FreeSWITCH, BroadSoft, and Metaswitch. Standard SIP ensures universal interoperability.

Reduces Communication Costs

Leverage low‑cost VoIP trunks while keeping your familiar analog phones. Eliminate expensive PSTN lines gradually, or use FXO gateways to connect to the PSTN as a backup.

Ideal for Hybrid Office Environments

Perfect for businesses migrating to VoIP, connecting remote analog equipment, or maintaining analog emergency phones. The GXW series bridges the technology gap effortlessly.

Grandstream GXW Series are high‑quality analog VoIP gateways that connect traditional telephone equipment to IP networks. Whether you need to link existing analog PBX trunks to a SIP‑based IP‑PBX (FXO) or connect a large number of analog phones to your VoIP network (FXS), there is a GXW model built for the job.

Two Essential Variants: The GXW4104 and GXW4108 are FXO gateways — they connect analog telephone lines (PSTN) to your VoIP system. This allows you to route incoming PSTN calls to SIP extensions, and outgoing SIP calls to PSTN lines, with failover and routing features. The GXW4216, 4224, and 4248 are FXS gateways — they connect up to 48 analog telephones, fax machines, or modems to your IP‑PBX. Each port becomes a SIP extension requiring no extra equipment per device.

Carrier‑Grade Features: All GXW devices include advanced echo cancellation, jitter buffering, and wideband audio codecs for clear conversations. T.38 fax relay ensures reliable faxing over IP. A powerful dial plan engine lets you manipulate numbers and routes precisely. Security is built‑in with TLS and SRTP encryption, plus HTTPS and secure SSH management.

Easy to Deploy: The intuitive web GUI simplifies configuration, and support for TR‑069 and auto‑provisioning allows remote management and zero‑touch deployment. Rack‑mount ears (included on GXW42xx) make data center installation clean and straightforward. Wall‑mount options are also available.

Perfect for the Hybrid Transition: If you're moving from analog to VoIP, the GXW series protects your existing investment. Keep your analog phones while gaining all the benefits of VoIP — unified dialing plans, lower call costs, and centralised management. Use FXO gateways to add PSTN backup to your IP‑PBX, ensuring call continuity even during internet outages.

Electro Creators supplies the complete GXW range with full warranty and expert support. Contact us for help choosing the right model, bulk pricing, or a demonstration. We serve Maharashtra, Madhya Pradesh, and Chhattisgarh.