An image forming apparatus includes at least one image bearing member. The method includes the steps of providing a respective first and second port within a transceiving terminal for receiving VoIP voice information of the VoIP telephone call from the first and second call participants, mixing the VoIP information from the ports of the first and second call participants and transferring the mixed VoIP information to the third call participant. The end of the adjusting shaft remote from the rotating handle has a second rectangular cross-section with dimensions identical to the first rectangular cross-section, and an engaging element is disposed on at least one surface of the adjusting shaft. At high operating speeds, the outer rim of the hub expands radially commensurate with expansion of the composite fiber rim so that enough of the outer rim remains in tight interference fit with the composite fiber rim to substantially minimize vibrations. The estimated value for the subsequent time instant may be determined based on one or more measured parameters related to an estimated value for detecting signaling information in a current time instant.