A lot of people use caller ID to filter calls. But sometimes some of those donation/sales(like newspaper, loan, etc)/survey calls, etc they call you will valid caller id(phone number) so you can't tell until you receive the call to see what they are for.
How about a feature similar to Auto Attendant which you can route all the calls or selected calls (using InboundCallRoute) to it. And the first thing this new "Auto Attendant" ask the caller is if they are the following.
1) Press 1 if you are friend/relative
2) Press 2 if this is a sales call
3) Press 3 if donation call
4) .....survey call
5) ...... (additional selection like "if calling from school", etc)
6) others
For Business user, can create a whole different list. Like Press 1 if you are calling for Customer support, etc.
Someone else may be able to come up with a better list. Also what's in the list hopefully is selectable from OBi device GUI.
And depend on their selection and option you set, it can forward the call to phone port or other Service. Or reject the call by saying the phone number you are calling doesn't accept sales call (or survey call), etc depend on the setting. So you can use OBi device GUI to specific if we allow such survey call or donation call and where to route it to. If we do allow donation call forward to PHONE Port, may be display something in the caller ID field to indicate it is a donation call? May be in the caller ID name, add something in the beginning like "(donation) Caller name". Even better if we can disable certain donation call during certain period of the day. Like no donation call during dinner time, etc.
Of course they can lie about what they call you for, but hopefully most of those survey, sales, or donation call answer the "auto attendant" truthfully.
I am sure many people wanted such a device and could definitely increase sale. Pretty much a "Personal Secretary" to help filter phone calls. Making this OBi110 device something that is way way more useful then just a Voip device. People may buy this even if they are not using Voip.