Connect a Physical VoIP Desk Phone (SIP)

If your team prefers a real desk phone over a headset and browser dialer, you can connect a compatible SIP device and it'll work through the same phone system — call recording, transcription, and transfers all still apply.

What you need

A desk phone that supports:

• Open SIP protocol
• Power over Ethernet (PoE), or an external power adapter
• Programmable line keys

Popular compatible models include the Yealink T54W/T58W, Poly VVX 450, Grandstream GXP 2170, Snom D785, and Cisco 7841 — though any open-SIP device should work.

Network requirements

Make sure your network allows:

• Ports 5060/5061 open for SIP signaling
• UDP ports 10000–20000 open for call audio

If these are blocked by a firewall, the phone may register but calls will fail to connect or carry no audio.

Setup steps

1. Go to Settings > Phone System > Advanced Settings > VoIP Deskphone (SIP).
2. Confirm or set your SIP domain.
3. Create an extension and a strong password for the device.
4. Assign that extension to a specific user.
5. Enter the SIP domain, extension, and password into the physical phone's configuration menu.
6. Place a test call in both directions to confirm audio works.

Enabling it for a user

The assigned user also needs Deskphone enabled in their own Call & Voicemail Settings so calls actually route to it — either as their primary device or as part of a ring-all group.