This guide will help you to configure you DrayTek router with a SIP ID from the Red service.

1. Once logged in to your device navigate to: IP PBX > Trunks > SIP Trunk
   
   
2. Select the 'Index' that you wish to configure:
   
   
   
3. Configure these settings:
   Profile Active: Enable
   Profile Name: Give the SIP Trunk a suitable name
   Domain/Realm: draytel.org
   Proxy: draytel.org
   Proxy Port: Set this to 5060
   Display Name: Set this to the desired SIP caller ID
   Account Number/Name: Enter the account number of your Red account
   Password: Set this to the password for the SIP Trunk
   
   
4. Click OK to save and apply these settings.
   
   
5. To see the status of the trunk, go to IP PBX > Trunks > SIP Trunk then see the character in the 'Status' column.
   R - the SIP Trunk is registered and can be used to make and receive calls.    - - Indicates that the SIP Trunk is configured to register and is currently not registered. It cannot be used to make or receive calls in this state.
   

You may need to configure how the SIP account is routed; for more information visit: https://draytek.co.uk/support/guides/draytel-incoming-numbers

For more information you can refer to: https://www.draytek.co.uk/support/guides/kb-bx2000-draytel