Compile DSNIFF package on a FritzBox from AVM / Voip Sniffer by appcode

I have a FritzBox 7050 from AVM (www.avm.de) which runs some kind of linux. I want to compile the DSNIFF package with all parts like webspy, etc... I also am looking for a VoIP based sniffer which... (Budget: $30-$250 USD, Jobs: Linux, PHP, Shell Script)
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