APPARATUS OF SUBSCRIBER PROCESS FOR ISDN

摘要

A ISDN subscriber management apparatus having a physical layer function where arranges the synchronous frame and regulates the synchronous in order to transmit the digital signal, a data link layer function, a network layer function where sets the calling and processes the cancellation message, an ISDN calling control function where executes the calling control function, a clock division function where supplies the synchronous clock to the subscriber board, a multiplex / inverted multiplex function for the user information about the audio and voice like that, and a connection function where connects with the switch part.