SmileLineDocs
Desk phones

Yealink

Register a Yealink T3x, T4x or T5x series IP phone on your desk phone line.

You need the line's SIP credentials from Settings → Call routing — see Desk phones for how to reveal them.

Connect the phone to your network and power. When it boots, press OK (or Menu → Status) to read its IP address off the screen.

In a browser on the same network, open https://<phone-ip> and sign in. The factory login is admin / admin — change it while you're there.

Go to Account → Register and fill in, for Account 1:

  • Line Active: Enabled
  • Label and Display Name: your practice name
  • Register Name and User Name: the line's username
  • Password: the line's password
  • Server Host: sip.telnyx.com, port 5061
  • Transport: TLS (use 5060 and UDP only if TLS is unavailable)
  • Server Expires: 180

Under Account → Codec, keep G722, PCMU and PCMA in the enabled list.

Click Confirm. The account status shows Registered within a few seconds, and the line icon on the handset turns solid.

Call the number from a mobile — the handset rings. If the line is two-way, dial out to confirm outbound.

More than one Yealink can register with the same credentials; they ring together. Repeat these steps on each handset.

If registration fails, check the password was copied exactly (reveal it again if unsure), and that your router isn't blocking outbound port 5061. Yealink's own manuals live at support.yealink.com, and the carrier's guide is Yealink: Setup with Telnyx.

Desk phones

Ring a physical SIP handset directly on one of your numbers — even when SmileLine is unreachable — and understand exactly what that number gives up in return.

Grandstream

Register a Grandstream GRP26xx series IP phone on your desk phone line.