Last update: 17 December 2013
Works with incoming and outgoing SIP calls.
Note that personal-voip.de wants your SIP ID as username, not your SIP number!
Also note that the contact must be send as <sipID>@sip.personal-voip.de. Therefore the parameter extension-in-contact must be set to true and the extension param must be empty or set to the same value as username!
If you discover that no/not the right caller ID is displayed on outgoing calls this might be helpful:
Fore some reason personal-voip.de seems to ignore effective_caller_id_number and origination_caller_id_number but instead uses the value from effective_caller_id_name and origination_caller_id_name. If the value from the name field is nummeric only the correct number is displayed. Otherwise the the first number from your block of phonenumbers is used.