This is the standard way NoMoRobo works:
When you create an account at NoMoRobo they will assign you an 800 number.
You setup your service provider to fork inbound calls to your home phone and NoMoRobo's 800 number.
When a call not in their database is sent to the 800 number NoMoRobo will generate a busy signal, so the other leg of the call to you phone will continue to ring.
When the call is in their database or the callerid is blocked NoMoRobo will answer the call, so your home phone will stop ringing.
END
Most service providers don't offer the forking feature or NoMoRobo might not know about your VOIP provider, so you have to lie.
You tell them your provider is Vonage to get the 800 number.
If your provider has the forking feature set it up there.
If they don't have the feature, the OBi110 can fork the inbound call.
Change the following
Service Providers -> SPx Service -> X_InboundCallRoute:
ph,sp2(18661234567@tf.callwithus.com;ui=$1)
tf.callwithus.com is a free tollfree service provider.
I don't remember all the steps setting up NoMoRobo.
After they assign the 800 number you must NOT proceed immediately to the next step.
The next step they will call the number you supplied to see if you have everything setup correctly.
You must now setup your provider or the above change to your OBi110 and then proceed to the next step.
If you make a mistake you will be able to repeat the test call.
If you are blocking calls on the OBi110's Line Port there is some tweaking you can do, but wait until you get this to work.
Post back and I will show you what to do.