Abstract: Described herein is a main board serial AT attachment (SATA) connector and SATA adapter that permits the assembly or disassembly of a STB (set-top box) and HDD (hard disk drive) dock without requiring that the unit be opened by a skilled technician. The SATA connector and SATA adapter may be keyed to prevent tampering or unauthorized connection of an external hard drive. Alignment and guide features may be included for easy assembly of the STB and HDD dock. The connector and adapter may be designed in such a way as to allow for simple modifications to correspond with various STB and HDD dock designs by adjusting the mating height of the connector and adapter.

Abstract: Described herein is a main board serial AT attachment (SATA) connector and SATA adapter that permits the assembly or disassembly of a STB (set-top box) and HDD (hard disk drive) dock without requiring that the unit be opened by a skilled technician. The SATA connector and SATA adapter may be keyed to prevent tampering or unauthorized connection of an external hard drive. Alignment and guide features may be included for easy assembly of the STB and HDD dock. The connector and adapter may be designed in such a way as to allow for simple modifications to correspond with various STB and HDD dock designs by adjusting the mating height of the connector and adapter.

Abstract: An electronic telephone switching system is described having peripheral units including a plurality of subscriber and line circuits, a plurality of trunk and tie line circuits, at least one attendant line circuit, a plurality of signaling tone receivers, and a plurality of link control circuits. Switching is carried out by a one wire speech path switching matrix and a one wire tone switching matrix. The system is centrally controlled and includes a central processing unit, a program memory, a scratch pad memory and a customer memory. Information, commands and addresses are communicated between the peripheral units and the central control and within the central control via bus lines. The bus lines between the peripheral units and the central control transmit data with lower rise time pulses than the bus lines interconnecting the components of the central control.

Abstract: An electronic telephone switching system is described having peripheral units including a plurality of subscriber and line circuit, a plurality of trunk and tie line circuits, at least one attendant line circuit, a plurality of signaling tone receivers, and a plurality of link control circuits. Switching is carried out by a one wire speech path switching matrix and a one wire tone switching matrix. The system is centrally controlled and includes a central processing unit, a program memory, a scratch pad memory and a customer memory. Information, commands and addresses are communicated between the peripheral units and the central control and within the central control via bus lines. The bus lines between the peripheral units and the central control transmit data with lower rise time pulses than the bus lines interconnecting the components of the central control.