17. A system comprising: at least one server device to: transmit a call, receive a ring tone signal based on the call, receive a signal that the call was answered, the signal including initial speech from an answering party, perform a ring tone operation to determine a user ring tone factor and a device ring tone factor based on a period during which the ring tone signal is received, perform a speech filtering operation to determine a user speech factor and a device speech factor based on a period of the initial speech, determine whether one or more words, contained in the initial speech, are included among a plurality of key words, perform a confidence filtering operation to determine a user confidence factor and a device confidence factor based on whether the one or more words are included among the plurality of key words, compute a total user factor based on the user ring tone factor, the user speech factor, and the user confidence factor, compute a total device factor based on the device ring tone factor, the device speech factor, and the device confidence factor, compare the user ring tone factor to the device ring tone factor when the total user factor is approximately equal to the total device factor, determine that the answering party is a user device when the user ring tone factor is less than the device ring tone factor, and output, to the user device, a non-interactive message when the answering party is determined to be the user device.
17. A system comprising: at least one server device to: transmit a call, receive a ring tone signal based on the call, receive a signal that the call was answered, the signal including initial speech from an answering party, perform a ring tone operation to determine a user ring tone factor and a device ring tone factor based on a period during which the ring tone signal is received, perform a speech filtering operation to determine a user speech factor and a device speech factor based on a period of the initial speech, determine whether one or more words, contained in the initial speech, are included among a plurality of key words, perform a confidence filtering operation to determine a user confidence factor and a device confidence factor based on whether the one or more words are included among the plurality of key words, compute a total user factor based on the user ring tone factor, the user speech factor, and the user confidence factor, compute a total device factor based on the device ring tone factor, the device speech factor, and the device confidence factor, compare the user ring tone factor to the device ring tone factor when the total user factor is approximately equal to the total device factor, determine that the answering party is a user device when the user ring tone factor is less than the device ring tone factor, and output, to the user device, a non-interactive message when the answering party is determined to be the user device. 18. The system of claim 17 , where the at least one server device is further to: determine that the answering party is the user device when the total user factor is less than the total device factor.