A method and system include screening and routing telephone calls, generating calling data reports and discounting billing for a customer’s wide area centrexPBX network, which includes an abbreviated dialing plan. In one embodiment, the wireless communications network includes an internet micro cell, an internet gateway, and a wireless service provider telephone switch. According to the invention, the concrete in at least one concrete web consists of high-tensile fibers andor at least one steel strut, preferably a double wall anchor, andor the hollow body which is devoid of ascendant forces has a conical or truncated pyramidal periphery whose uppermost end forms a dome-shaped arch. The signal processing circuit generates a set of pulse signals which are attached to the set of PWM signals respectively. A locking mechanism may be provided that resists inadvertent or accidental movement or retraction of the stent delivery system components during packaging, sterilization, shipping, storage, handling and preparation of the stent delivery system.