A system and method for connecting pending and preset telephone calls to facilitate transitioning to a phone call. The hinge core and one connection plate together form a hinge with a concave hinge surface on the hinge core and with a complementary convex hinge surface on the connection plate. The element part conductor has a shape substantially symmetric to a line connecting the coupling conductors or the parts coupled with the feeder. The sequential state machines are exercised to sequentially step through plural ones of their unique states.