It is possible to have a calling log sent directly to your computer with the right software set-up. The same software can be used to automatically record the content of incoming calls.
This method is quite simple – and quite common – for those who are recording their own phone conversations for business purposes. But it can be trickier, not to mention legally problematic, to use the same method to record someone else’s conversation. For example, if you share a computer with the target of your surveillance operations, then they will likely be able to detect its presence.
Still, call software that logs incoming calls and records the conversation may be your first port of call when it comes to audio surveillance, simply because it both logs numbers and records content for you. It will cost you around $50 and can be downloaded from the Internet. There is more advanced software dedicated to telephone services that will automatically record outgoing calls as well, which will cost more in the range of $150.