Numerous calls since 7 Sep 12 with no one on end of call when picking up. Probably computer initiated. Caller ID shows this basic format 08842398XX. Once home phone rings 4 times it stops and it is immediately followed by my mobile ringing in the format 02841585XX also hanging up after 4 rings. These two numbers have to be linked.

Got a missed call from: (02) 8415 8571
And also
(02) 8415 8579 twice from each number today 11/02/2013
I have tried to call both numbers back various times but it will even dial. It's just cuts out.

numerous calls from numbers starting with 0284158 then ending with: 571, 526, 537, 533, 550, 522, 542.
Mob rings twice then hangs up.
I called two numbers but there no one answers.