| 摘要 |
A customer premises system having two-wire buses for transmission of digital telephony signals between digital terminal ends of a private branch exchange (PBX) and respective digital end equipment units includes low pass filters coupled to terminal ends of the two-wire buses serving the digital equipment, for isolation of a home PNA signal from the digital end equipment units and the digital terminal ends of the PBX, and a first high pass filter configured for cross coupling the home PNA signal across the two-wire buses. A second high pass filter is used for cross coupling home PNA signals across two-wire (e.g., tip and ring) buses used to connect analog end equipment to analog terminal ends of the PBX. A third high pass filter, matched with the first and second high pass filters, is used for cross coupling the home PNA signals between the first high pass filter and the second high pass filter, enabling a home network to be implemented independent of whether the network node is coupled to a two-wire bus coupled to the analog portion of the PBX or the digital portion of the PBX. |
