Block Long Distance Transfers

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Sep 27th, 2007
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What are the config steps to prevent toll fraud where a user sets his call forward all (transfer) to an long distance number. I don't want to stop all transfers to off-net since users ofter transfer/call forward their main line to a cell phonem which is off net but stil local. Just want to prevent long distance transfers.

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Rob Huffman Thu, 09/27/2007 - 14:38
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Hi Robert,


In most CCM configurations it is recommended to have multiple CSS's (Calling Search Space) that limit access to various calling levels.


For example you might have;


On-Campus CSS - Allows only 4-digit Dialing

Local CSS - Allows 9+7-digit Local Dialing

Long Distance CSS - Allows full 9(0+1)10-digit


You can then apply these same CSS to the Call Forward All CSS to prevent against Toll Fraud abuse. So in your case you might allow either On-Campus or Local CSS against Call Forward All :)


Hope this helps!

Rob

rposuk001 Thu, 09/27/2007 - 15:03
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Thanks everyone. I was so focused on the call classification field in the route patterns that I didn't consider the easiest solution that was to change the Foward All CSS. Thanks again. That's the easiest way.

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