The present invention relates to compounds and derivatives thereof, their synthesis, and their use as estrogen receptor modulators. The leaflets are flat with the webs folded beneath in closed closure position. The second shaft member, being coupled to the main body and is perpendicular to the first shaft member, and the main body is rotatable with respect to the first and the second shaft members transversely respectively. The supporting tray is secured on a bottom surface of the motherboard with a post formed thereunder. The tray has a base wall formed with ribs projecting from its upper face and from its lower face, respectively. In response to the call hold-initiating message, the network element may take one or more actions, including releasing one or more network resources andor providing a service to the second party during the period the call remains on hold.