We like analyzing our Call Log. We want to know the meaning of all data items, though. Does anyone know what Hang Up is? How is it different from Missed or Rejected for example?
A lot depends on the type of call handling, just like with most phone systems. For example, if I call our main number, and the AA recording answers, but I hang up - that's still and accepted call. Now if I call my DID number (after hours) and my VM comes on, and I hangup without leaving a message, that's a missed call. If I call my Queue group and hang up while it is search for an available agent, that's a hangup.
I do get some "rejected" calls but they never appear to be legitimate calls. So I am going to assume they were calls rejected by the carrier (RC) for whatever reason (hackers, false CLID, incorrect digits sent or dialed, etc.) Sometimes an explanation for the reject is provided in the RC Call Log. Here is one I got in my log "A call loop occurred due to an incorrect call forwarding configuration. Please check that you are not forwarding calls back to your own account."