Grandstream
Register a Grandstream GRP26xx 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. Press the round menu button → Status → Network to read its IP address.
In a browser on the same network, open https://<phone-ip> and sign in
(factory login admin / admin, or the random password on the sticker
under newer units). Change it while you're there.
Go to Accounts → Account 1 → General Settings and fill in:
- Account Active: Yes
- Account Name: your practice name
- SIP Server:
sip.telnyx.com - SIP User ID and Authenticate ID: the line's username
- Authenticate Password: the line's password
Under Accounts → Account 1 → SIP Settings, set SIP Transport to
TLS (port 5061) and Register Expiration to 3 minutes.
Under Accounts → Account 1 → Audio Settings, keep PCMU, PCMA and G722 as the preferred vocoders.
Click Save and Apply. Status → Account Status shows the account as Registered.
Call the number from a mobile — the handset rings. If the line is two-way, dial out to confirm outbound.
Grandstream's manuals live at grandstream.com/support, and the carrier's guide is Grandstream GRP2612: SIP trunk configuration.