Is there a way to block callers that show up as "UKNOWN" using Obi/Google Voice?

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nexus14:
I love Google Voice because it has a robust Spam filter that works most of the time. However, there are callers that show up as "UNKNOWN" with no associated number and Google Voice is unable to filter them.

I was wondering if Obitalk has such a feature to block these individuals?

From here:
http://www.cs.rutgers.edu/~watrous/phone-features.html
Quote

Incoming calls with Caller ID blocked receive a message telling them this line does not accept calls from callers who block their number.


I was wondering if such a feature exists for us?

Many thanks.

RonR:
Have you tried *77, which should block all anonymous calls coming in on any trunk?

If you only want to block anonymous calls on a particular trunk, set:

Voice Services -> SP1 Service -> AnonymousCallBlockEnable : (checked)

Voice Services -> SP2 Service -> AnonymousCallBlockEnable : (checked)

Voice Services -> OBiTALK Service -> AnonymousCallBlockEnable : (checked)

Physical Interfaces -> LINE Port -> AnonymousCallBlockEnable : (checked)

nexus14:
Sorry, I am a complete idiot when it comes to this stuff. As you can probably tell, I was only able to install Obi using the web interface. How does one get access to options to enable and disable the things you listed?


edit: I am a bigger idiot than I thought.

from http://obihai.com/OBiAdminGuide.htm,
Quote

Anonymous Call Block

Anonymous Call Block allows you to block calls from incoming callers when there is no identifying caller ID name or number.  Incoming calls will be presented with a busy signal.  To use Anonymous Call Block, from the phone attached to the OBi, dial *77.  To cancel Anonymous Call Block, from the phone attached to the OBi, dial *78.

It appears I simply have to dial *77 from any phone connected to my Obi. Is it really that simple?

nexus14:
Okay, it looks like I found the "expert" settings. I am unsure if the Block Anonymous calls is enabled or not.

Here is a screenshot: http://dl.dropbox.com/u/939029/obi%20call%20block.JPG


I am not sure which checkbox should be checked.

Thanks!

nexus14:
Can anyone let me know if I have my settings correctly enabled for blocking of anonymous calls? I thought it was working fine until I received an unknown caller ID:




EDIT:

I want to add that the above setting DOES work in blocking anonymous calls. I just used an app on my Android device that hides your number (aka simulate an anonymous call). I placed a call to my Google Voice number and my phones did not ring.

However, Google Voice still has a record of the UNKNOWN call but all that matters is that my phones do not ring from spammers:

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