How to Use 12VoIP with your SIP device

You need a 12VoIP username and password in order to call via our network. So first sign up with 12VoIP by downloading and installing the application and create your login.

In order to call ULTRA CHEAP via the 12VoIP network, enter the settings below:

You can use 12VoIP with the following types of Sip devices:

  1. SIP ATA (Analogue Telephone Adapter)
  2. SIP Router
  3. xDSL Modem

The most devices are equipped with a combination of the following ports.

Example 1

(this is merely an example layout, every type of device can be different)

Example 2

(this is merely an example layout, every type of device can be different)

  1. (A)DSL: connect your line from your (A)DSL provider (not available on a ATA)
  2. WAN: connect your line from your xDSL modem/router
  3. LAN: port for your (home) network, you can connect e.g. your PC, lap-top, network-printer or wireless router
  4. PHONE: here you can connect your analogue telephone
  5. LINE: connect your analogue (PSTN) telephone line
  6. USB: you can connect PC or lap-top with a free USB port

Some SIP devices have more than one LAN port and/or PHONE port available.

For the hardware connections from your SIP device look at the above information and your user manual. After connecting the hardware you have to make sure that your software is installed and configured the right way.

Software configuration


SIP port : 5060
Registrar :
Proxy server :
Outbound proxy server : leave empty
Account name : your 12VoIP username
Password : your 12VoIP password
Display name/number : your 12VoIP username or voipnumber
Stunserver (option) :

Below are some examples of the software configuration of various popular SIP devices. Please also consult the manual that came with your SIP device



If you have audio problems:
Use a STUN server (e.g. with port 3478 (if supported by your device)
Use the G.711 codec