Grandstream GXW4216 V2 Analog FXS IP Gateway- 16 Port

The Grandstream GXW4216 V2 connects 16 analogue phones or fax machines to a VoIP system. It is the entry point of the GXW4200 V2 range — the size that fits a small office, a surgery, a school block or a single hotel floor with analogue phones still in the rooms.

Each port behaves like its own extension. Plug in the analogue device, register the port to the PBX or provider, and the handset keeps working exactly as it did — same ring, same dial tone, same fax machine — while the call travels over the network.

Key features

• 16 FXS ports — each one an independent analogue extension
• Gigabit network port — no bottleneck at the gateway
• T.38 fax relay to 14.4 kbps — Group 3 fax over IP rather than fax over a voice codec
• Wide codec support — G.711, G.723.1, G.726, G.729A/B and iLBC
• 3-way conferencing per port — available on every analogue extension
• Full analogue feature set — transfer, forward, call waiting, DND and message waiting indication
• Flexible dial plans — shape dialling per port or across the gateway
• TLS and SRTP — signalling and media encryption
• Automated provisioning — configure at scale rather than port by port

Works with

• GXW4224 V2 — 24 ports
• GXW4232 V2 — 32 ports
• GXW4248 V2 — 48 ports
• HT818 — 8 ports, for a smaller site
• PSU for GXW4216 / 4224 / 4232 — spare or replacement power supply
• Grandstream UCM IP PBX range — register the ports to an on-site PBX

Frequently asked questions

Will my existing analogue phones just work?

Yes. An FXS port supplies line voltage, dial tone and ring current exactly as an analogue exchange line does, so the handset behaves normally. Nothing changes for the person using it.

Do fax machines actually work over this?

Fax is the part worth planning. The gateway supports T.38 fax relay, which carries the fax as data rather than trying to squeeze fax tones through a voice codec — that is what makes it reliable. Your provider or PBX also has to support T.38 at the other end.

16 ports or an 8-port HT818?

If you have eight devices or fewer and no rack, the HT818 is smaller and cheaper. Choose the GXW4216 V2 when the count is higher, when it is going in a comms room, or when you want room to grow.

How many ports do I actually need?

One per analogue device, not per user. Count the handsets, fax machines, lift phones, door entry panels and alarm diallers. It is common to find more analogue devices in a building than anyone expected.

Can I split the ports across different SIP accounts?

Yes. Each port registers independently, so ports can belong to different extensions, different departments or even different providers.

Migrating an analogue estate? Call 0333 242 1314 or email sales@clisecure.com — tell us how many devices and where the cabling terminates and we will size it with you.