| 摘要 |
Electrical switching apparatus 22 is provided, for connection to a five point overvoltage protector socket on a standard telecommunications exchange wiring block. A conventional five point overvoltage protector socket comprises a first pair of connection points 3,4 for connecting a customer circuit 5,6, a second pair of connection points 7,8 for connecting telecommunications exchange equipment 10, and an earth connector 11 adapted to receive an overvoltage protector module (12,22). The first pair of connection points 3,4 is normally connected to the second pair 7,8 via a conventional overvoltage protector module. The electrical switching apparatus 22 of the present invention provides a third pair of electrical connection points 14,15 for connecting further telecommunications equipment 20 and switching means 25 adapted to be varied between a first state in which the first pair of connection points 3,4 is electrically connected to the second pair of connection points 7,8, and a second state in which the first pair of connection points 3,4 is connected to the third pair of connection points 14,15. |
