| 摘要 |
<p>Method to verify the functionality of a flexible access system comprising at least one digital multiplex unit having a plurality of user data ports, a multiplex unit having a plurality of telephone interfaces and a transmission module for communication via a network interface at the public fibre optic network, the verification of the digital multiplex being done by using an instrument which generates, in flexible fashion, a frame of digital signals and then closes the electrical loop at the user ports by using modular certification elements, while the verification of the telephone multiplex is done by using a device able to transmit, receive and compare analog signals, consisting of a generator and receiver of electrical signals, a scanning array, an inverter, two block filters and two deviators. <IMAGE></p> |
