| 摘要 |
In signal-splitting equipment for multiple subscribers, circuitry is disposed on a signal-splitter card (32) which connects with a back plane (30) providing physical support and electrical connection to other splitter cards (32) and to distant sites, as well as to an interface (34) with a system (28) conducting automatic testing of DSL circuits. Each splitter card (32) carries a separate relay card (38) with signal-routing relay circuitry, the relay card being connected by means of a switching connector (44) having bypass circuitry which ensures normal communication of DSL signals and audio signals in the event that a relay card (38) is disconnected from its signal-splitter card (32). During testing of the equipment, the system operates the relays (RELAY 1,2,3,4) of the relay cards (38) of the respective signal-splitter cards (32) for connection of test equipment (26) to various equipment associated with a subscriber (12). |
