Usage Measurement Usage measurement for calls shall begin when answer supervision or equivalent Signaling System 7 (SS7) message is received from the terminating office and shall end at the time of call disconnect by the calling or called subscriber, whichever occurs first.
Quality control system (i) The Contractor shall establish a quality control mechanism to ensure compliance with the provisions of this Agreement (the “Quality Assurance Plan” or “QAP”).
Trunk Group Architecture and Traffic Routing The Parties shall jointly engineer and configure Local/IntraLATA Trunks over the physical Interconnection arrangements as follows: