Abstract: A VoIP gateway, a VoIP phone system and an auto call-transferring method for VoIP are disclosed. The method is used in the VoIP gateway with a plurality of predetermined IDs, wherein the method comprises the steps of: receiving a call connection request for a first predetermined ID form a calling end point; detecting if the first predetermined ID is in use; and establishing a call connection between the calling end point and a second predetermined ID when the first predetermined ID is in use.

Abstract: A method for setting an IP (Internet Protocol) address to a network device is provided. In this method, a step is first performed to check if a DHCP server exists in a network domain and obtain a checking result. When the checking result is yes, a dynamic IP address is obtained from the DHCP server and is set to a network device. When the checking result is no, a predetermined IP address and a predetermined gateway address are set to the network device.

Abstract: A fiber optics wavelength add/drop module and wavelength division multiplexer is presented based on multi-fiber collimators. In one embodiment, the device has a total of six input/output fibers to resemble a dual three-port add/drop devices configuration. In another embodiment, the devices are cascaded to make an integrated multiplexer/demultiplexer module. In another embodiment, the output fibers are connected by special fibers to produce a miniature bend to form a compact device. The configuration can raduce the number of components by at least a factor of two, thus reducing the cost and size, and enhancing the reliability.