Hi,
First we must point out Voipuser is NOT a commercial service, it is intended as a system to allow you (and us) to test and tryout a raft of facilities related to VoIP.
Although a few of our members do use the system in relation to their businesses, we do not offer service guarantees and there are restrictions they may prove problematic
But to answer your questions
1/ All the numbers shown in My Numbers are free and you may select up to one from each. Bear in mind that not all number prefixes are available to be called from all countries though.
2/ Calling the test numbers is free when dialing through your Voipuser account.
Dialing from any other number will be charged at the appropriate rate on your phone bill. Also note to call the test numbers from a US telephone you will need to dial the International code +44 870 or +44 844 etc
3/ The 0844 numbers available from My Numbers are from a different number bank and are charged on a slightly different tarrif to your main Voipuser number.
4/ Telephone numbers are precious when we run out of them and some cost money to maintain. We reserve the right to be able to reclaim numbers that are not being used. Three months is a reasonable cut off point.
5/ It does depend on the carrier whether they permit access to our 0844 numbers. Also note it is a UK number you are dialing, so it must be prefixed with the international dial code i.e. 0044 844 xxx
6/ Yes, provided you add the relevant prefix for the SIP provider. Check sipbroker.org if stuck
7/ Correct
8/ The rating scale varies by usage and the state of the pot, but in general £1 a point is probably about right. If donating in anything but pounds stirling, please bare in mind conversion charges hit us hard, so donations of £5 or more (or equivalent) are appreciated and that as time passes your rating will be affected whether you use the 'donation' or not.
It is a lot simpler for everybody if you can get people to use your Voipuser number
9/ Currently the cut off is set at 10 minutes