What is a device extension?
Device extensions are the bridge between your VoIP phones or softphones and the Siptalk network. Each extension provides:
- Unique SIP username and password
- Server connection details
- Extension number for internal calls
- QR code for easy app setup
Before you start
To add a device extension, you'll need:
- An organisation already added to your account
- A phone number or custom CLI for outgoing calls
- Your VoIP device or softphone ready for configuration
Navigate to device extensions
Go to the Services → Device Extensions section in the portal.
Click the [Add New] button to create a new extension.
If you see a notice about requiring a CLI, you'll need to add a phone number first:
Select outgoing CLI
If you have a phone number configured, you'll see the CLI selection screen. Choose which number should display when making outgoing calls from this extension.
Select your preferred CLI and click [Add New Extension].
Access extension details
After creation, you'll see the extension management screen with all registration details:
The extension details page provides everything you need to configure your device:
- SIP Username — Unique identifier for your device
- SIP Password — Secure authentication credential
- SIP Server — Connection endpoint for registration
- Extension Number — Internal dialing number
- QR Code — For automatic app configuration
Troubleshooting
Can't add extension?
Ensure you have at least one phone number or custom CLI configured. Extensions require an outgoing caller ID.
Device won't register?
Double-check credentials are entered correctly. Also ensure SIP ALG is disabled on your router, as this commonly causes registration issues.
QR code not working?
Ensure you're using a compatible softphone app that supports QR provisioning. The Cloud Softphone app is recommended for best compatibility.
Extension not receiving calls?
Check that the extension is included in your call routing configuration. Extensions must be added to a ring group or routing profile to receive inbound calls.