Abstract: A peripheral connector includes a peripheral signal terminal set and a test signal terminal set for respectively electrically connecting a peripheral interface and a boundary scan interface of a microcomputer. A socket is selectively connectable to a peripheral device for data transmission between the peripheral device and the microcomputer or a test module for conducting a boundary scan test on the microcomputer. A converting unit has a logic circuit and a transmission circuit. The logic circuit converts an electric potential, which is transmitted from the socket and corresponds to one of the peripheral device and the test module that is connected to the socket, into a digital control signal for controlling enablement or disablement of the transmission circuit. The test module is able to conduct a boundary scan test on the microcomputer only when the transmission circuit is enabled.

Abstract: A communication apparatus includes a housing and an electronic device installed in the housing. The housing has a shell body having a top wall, a front wall and a mounting zone defined by a part of the top wall and a part of the front wall, and a cover coupled to the mounting zone. The mounting zone is provided with a first row of through holes and a second row of through holes. The cover has a row of light-guiding rods at a back side thereof, which are respectively selectively insertable into the first or second row of through holes. The electronic device includes a circuit board and a plurality of lamps electrically connected to and controlled by the circuit board.

Abstract: An electronic device holder for holding thereon an electronic device includes a fixed bracket, which can be fixedly mounted on the wall or ceiling with screws or the like and has upright locating rods, and a movable bracket, which is coupled to the fixed bracket and has upright locating rods and is movable relative to the fixed bracket between a first position where the locating rods of the fixed bracket and the movable brackets are respectively disengaged from the electronic device put on the electronic device holder, and a second position where the locating rods of the fixed bracket and the movable bracket are respectively forced into engagement with the electronic device to lock the electronic device to the electronic device holder.

Abstract: A error detection/correction system includes a plurality of cable modems for error detection/correction, a CMTS connected with the cable modems for access of MAC addresses of the cable modems and for controlling allocation of data flow of the cable modems, and a sample comparison system having a database of comparable data and connected with the CMTS for access of the data flow of the cable modems and then for comparison between the data flow and the comparable data to verify whether each of the cable modems functions well or not.

Abstract: An electronic device, which is capable of multidirectional rotation, includes a connecting unit, which has a connecting portion at one end detachably connectable to an external electronic device and a spherical ball socket at an opposite end, and a body unit having a housing and an electronic circuit assembly mounted inside the housing. The housing has a coupling structure that receives the spherical ball socket for allowing rotation of the spherical ball socket relative to the housing.

Abstract: The invention herein is fallback function communications device comprised of a microprocessor, utilized to perform a predetermined operation and processing of a predetermined input signal and then output a corresponding signal, as well as a minimum of one relay circuit having an amplifier circuit and a relay. The terminal at the first side of the relay is connected to the telephone line tip/ring terminal, while the terminal at the second side of the relay is connected to the Public Services Telephone Network (PSTN) tip/ring terminal of the microprocessor. An off-hook detection circuit is connected to the PSTN tip/ring terminal and also connected to the ring detection terminal of the said microprocessor. A dummy load circuit is connected to the tip terminal and the ring terminal of the PSTN. As such, in the event of Voice Over Internet Protocol (VOIP) system failure, the present invention is capable of automatically switching to the PSTN and thereby maintain telephone system operation.

Abstract: A downstream power calibration method comprises the following procedures. First, select base sampling frequencies and sampling power levels, thereby generating base sampling signals. Next, input base sampling signals into a modem such that obtaining each sum of the feedback signals responding to the tuner and the IF amplifier of the modem by the modem chip corresponding each said base sampling signal, thereby setting up a sampling data table. Third, repeat the procedure mention above for a plurality of modems to get a plurality of sampling data tables respectively, and then obtain a mean data table. Fourth, select spot frequencies and spot power levels from the base sampling frequencies and the base sampling power levels to generate spot sampling signals. Thereafter, input the spot sampling signals into a cable modem and set up a skeleton data table.

Abstract: The invention herein is fallback function communications device comprised of a microprocessor, utilized to perform a predetermined operation and processing of a predetermined input signal and then output a corresponding signal, as well as a minimum of one relay circuit having an amplifier circuit and a relay. The terminal at the first side of the relay is connected to the telephone line tip/ring terminal, while the terminal at the second side of the relay is connected to the Public Services Telephone Network (PSTN) tip/ring terminal of the microprocessor. An off-hook detection circuit is connected to the PSTN tip/ring terminal and also connected to the ring detection terminal of the said microprocessor. A dummy load circuit is connected to the tip terminal and the ring terminal of the PSTN. As such, in the event of Voice Over Internet Protocol (VOIP) system failure, the present invention is capable of automatically switching to the PSTN and thereby maintain telephone system operation.