Patent ID: 6937719

Claim:
A method for implementing narrowband and broadband services on a transmission link of a telecommunications network, the method comprising the steps of: transferring signals belonging to a narrowband service in a first frequency range below a given threshold frequency and signals belonging to a broadband service in a second frequency range above said threshold frequency in the transmission link; separating signals relating to the narrowband service in a passive low-pass filter block connected between the transmission link and a single discrete active impedance converting means; receiving the signals relating to the narrowband service from the passive low-pass filter block in the discrete active impedance converting means, said discrete active impedance converting means located entirely between the passive low-pass filter block and a first interface; matching impedance of the first interface to a characteristic impedance of the transmission link in said discrete active impedance converting means, wherein matching is conducted without external control entirely after the step of separating the signals relating to the narrowband service; and separating signals relating to a broadband service in a high-pass filter unit connected between the transmission link and a second interface.