A system and method for conducting a video call between an originating device and a terminating device by establishing a peer-to-peer connection between the devices. Near-vertical wells with a deviation angle of less than 30 degrees are considered. The relay node executes the relay handover in a case of receipt of the relay handover command from the radio base station or transfers the terminal handover command in a case of receipt of the terminal handover command from the radio base station. The golf ball may, optionally, include a mantle layer made of an ionomer material. In preferred embodiments, the invention provides umbrellas that comprise multiple sets of ribs supporting a canopy structure and having a mechanism associated with each set of ribs for influencing the angle or elevation of the rib sets. The output tray automatically increases in capacity as the stack of copies in it accumulates, without external power source or control, while maintaining a relatively constant elevation relative to the copier output port, and automatically returns to its original position when partially or completely unloaded.