I have read this topic previously: http://www.obitalk.com/forum/index.php?topic=4067.0
And I implemented its suggestions. This eliminated the annoying 4 digit sip scanners I was getting. My parents also have an Obi (Obi 100) and my mom told me she was getting these weird numbers calling every 5 minutes or so (they too have the 4 digit sip scanner block set up already). I logged into their Obi and looked at the history. These are the numbers that were calling:
18161368853351
17161368853351
10161368853351
12161368853351
1+161368853351
14161368853351
1161368853351
19161368853351
199161368853351
11161368853351
13161368853351
16161368853351
100161368853351
15161368853351
All of the numbers were inbound on SP1. What on earth is going on? How do I block these numbers?!
See http://www.obitalk.com/forum/index.php?topic=5467.0
I recommend method 3 or 4.
I agree with Shale - my personal choice would be method 4 "The Oleg Method". However, if you are happy with the old method this will work as the numbers have the same sequence of digits after the first few:
{(?|x|xx|xxx|xxxx|xxxxx|xxxxxx|x.61368853351):} ...