asterisk users - Mar 2005 - Block anonymous calls

Hi. I am trying to set up my Asterisk box to block anonymous calls.

I am having some grief from telemarketer calls to my number and I would like 
to block it.

I see from my CDR's that some of my callers also have "unknown" in
their
FROM field. I would like to let them through. Only block the FROM 
"anonymous" that the telemarketers use.

Have anyone here done it and would like to drop a line explaining how ?

Fredrik

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Fredrik wrote:

 > I see from my CDR's that some of my callers also have
"unknown" in
 > their FROM field. I would like to let them through. Only block the
 > FROM "anonymous" that the telemarketers use.

Fredrik, I found something on the Wiki a while back... Try this...

exten => s,1,Answer
exten => s,2,NoOp(${CALLERID})
exten => s,3,ResponseTimeout(10)
exten => s,4,GotoIf($["${CALLERIDNUM}" = ""]?|1000)
exten => s,5,GotoIf($["${CALLERIDNUM:0:3}" =
"877"]?s|1000)
exten => s,6,GotoIf($["${CALLERIDNUM:0:3}" =
"866"]?s|1000)
exten => s,7,GotoIf($["${CALLERIDNUM:0:3}" =
"800"]?s|1000)
exten => s,8,Macro(stdexten,${SIP0})
exten => s,9,Hangup
exten => s,1000,Background(SPAMSTOPPER)
exten => s,1001,Hangup

I have used this for a few months at home, and it works great...

Blake