Abstract: The disclosed systems may be utilized for call monitoring, including determining whether a callee may be experiencing an outage based on an expected call arrival interval. Methods of call monitoring are also disclosed.

Abstract: A communications system may include one or more processors coupled to memory. The one or more processors may be collectively operable to execute a communications environment. The communications environment may be operable to receive a request to place an outbound call from an outbound telephone number to a specified telephone number. The communications environment may be operable to assign a caller identification number from a set of caller identification numbers to the outbound call based on one or more criterion associated with at least one prior call relating to the specified telephone number. A method of caller identification is also disclosed.

Abstract: A system for monitoring phone numbers includes a computing device having at least one processor and memory associated with the processor. A telephone network supports a plurality of telephone numbers. For each of the phone numbers, the computing device is configured to detect call activity involving the phone number during a detection period having a preselected duration, determine an answer seizure ratio (ASR) for the phone number during the detection period from the call activity, determine a difference between the ASR during the detection period and an ASR from at least one previous detection period for the phone number, and determine whether the difference satisfies at least one preselected criterion. When the criterion is satisfied, the computing device instigates a procedure to investigate or repair the phone number.