Patent ID: 7558385

Claim:
An impedance matcher for matching impedance of at least one high bit rate transmission channel of a copper-wired terminal installation connected to an access network delivering narrowband services and broadband services, said installation comprising a high bit rate x-DSL modem and a jack, said impedance matcher comprising: an adjustment module installed in said jack, said adjustment module comprising an RC circuit and being configured to insert a terminating impedance into said jack when said jack is not connected to said high bit rate x-DSL modem; and a coupling module connected to the high bit rate x-DSL modem, said coupling module comprising a first resistor configured for connection in parallel with a capacitor of the adjustment module to reverse-bias a varicap diode of the adjustment module, said coupling module being configured for combination with said adjustment module when said high bit rate x-DSL modem is connected to said jack to transform the impedance inserted into said jack.