According to the BLS, the average secondary school teacher in the U.S. earns an annual salary of $56,760. A 40-hour work week employee would have to earn $27.28 per hour to earn as much over the course of a year. In some areas, teacher's unions enter into collective bargaining agreements with school districts.
Definition - What does Voice Over Internet Protocol (VoIP) mean? Voice over Internet Protocol (VoIP) is a technology used for delivering different kinds of data from a source to a destination using IP (Internet Protocol). The data may be in many forms, including files, voice communication, pictures, fax or multimedia messages.
Using SIP for VoIP Call Control IP in the VoIP Environment Session Initiation Protocol (SIP), which is defined in Internet Engineering Task Force (IETF) RFC 3261, is now in contention for leadership as the most widely used voice over IP call control protocol.