Patent ID: 8259754
Filing Date: 2012-09-04
Classification: H04M

Abstract:
1. A common interface device for use in a combined line termination arrangement for an access system, the access system being configured to support a broadband transmission mode and a narrowband transmission mode, the combined line termination arrangement including a first line termination and a second line termination, the first and second line terminations being connectable to a first line card for broadband transmission mode and a second line card for narrowband transmission mode, the common interface device comprising: a common port configured to at least one of receive and transmit a signal in at least one of the broadband transmission mode and the narrowband transmission mode; a first coupling path configured to provide a connection from the common port to the first line card through a bi-directional high pass filter in said first line termination; a second coupling path configured to provide a connection from the common port to the second line card through a bi-directional low-pass filter; a third coupling path configured to provide a connection from the common port to the second line card; and a first switching structure including a first connection configuration and a second connection configuration, wherein the first connection configuration is configured to select the first coupling path and the second coupling path, and the second connection configuration is configured to select the third coupling path, wherein in a first switching position the first connection configuration is configured to connect both the first and the second line terminations to the common port, and in a second switching position the second connection configuration is configured to disconnect the broadband transmission mode from the common port.