Snom calls a SIP account an identity. This guide follows the D785 manual rather than assuming every D7/D8 model has the same menus. Have the phone administrator handle the setup if the device is managed by your company.
1. Get your IllyVoIP line details
Open SIP Lines and select the line you will use. You need its SIP username, SIP password and server address. Your Portal login password is not necessarily your SIP password. This walkthrough uses password authentication; do not switch an IP-authenticated line without checking which existing devices depend on it.
If you need another line, follow Create a SIP line and review any subscription charge before confirming. Buying a phone number is not required just to register the phone.
2. Configure the phone
- Find the phone’s local IP address and open its web interface from your trusted local network.
- Enter administrator mode and choose an unused Identity in the left menu. Open its Login tab.
- Enable the identity and enter the account details below.
- After changing Account or Registrar, use Re-Register and Save. For other changes, follow the displayed Apply/Save controls.
| Phone field | What to enter |
|---|---|
| Account | SIP username |
| Registrar | SIP server hostname |
| Authentication User Name | SIP username / authentication ID |
| Password | SIP password |
Identity selection matters
A successful registration on one identity does not mean the phone will use it for the next outgoing call. Select the configured identity before dialing. Keep any existing work identities intact. A local display label helps you recognize the account, while IllyVoIP’s caller-ID permissions still determine which outgoing number may be presented.
3. Match connection and audio settings
Use the server, destination port and transport shown in your account’s SIP connection details. Do not put the phone’s local IP into the server field. SIP signaling and audio encryption are separate settings: the Portal line’s audio mode must match what the phone supports and uses. Standard RTP is unencrypted; SDES-SRTP and DTLS-SRTP are different modes. Do not select DTLS simply because a browser uses it.
If unsure, ask Support about your exact model before changing an existing working line. Do not disable your firewall or expose the phone administration page to the Internet.
4. Test outgoing and incoming calls
- Once registered, select the configured line and call a number you control using its country code. Check your balance and destination rate first; this can be a paid call.
- Check two-way audio and the outgoing caller ID.
- For incoming calls, route an active IllyVoIP number to this SIP line. Follow phone-number configuration. Registering a handset alone does not change a number’s routing.
If it does not work
No registration: check the server, username, password and authentication mode. Registered but unable to call: check the dialed number, package, balance and caller ID. Connected but no audio: check the network and matching audio settings.
Send Support the model, firmware version, time/timezone, visible error and public call reference if available. Never include passwords or private account screenshots. The SIP code reference helps describe the failure.
Device documentation
Open the official documentation. Based on manufacturer documentation and the current IllyVoIP Portal; not a certification of every model or a claim of physical-device testing.