ISDN terminal equipment control method

A method for controlling ISDN terminals connected to passive buses conforming to an ISDN basic interface, said passive buses being provided on an internal side of an exchange, a plurality of lines conforming to the ISDN basic interface or a primary rate interface being connected to an external side thereof, each of said ISDN terminals being coupled to one of a plurality of local area networks, said method comprising the steps of:

• a) managing, in each of the passive buses, status of use of information channels in each of the passive buses by means of a communication server connected to the local area networks;
• b) sending, from the ISDN terminals, communication server command data showing that the ISDN terminals will use the information channels;
• c) updating, in each of the passive buses, management data showing a status of use of the information channels managed by said step a) in response to receipt of the command data;
• and
• d) sending, in each of the passive buses, updated management data showing, in each of the passive buses, a status of use of the information channels obtained after the command data is received to the ISDN terminals via the local area networks.

A method for controlling ISDN terminals connected to passive buses conforming to an ISDN basic interface, said passive buses being provided on an internal side of an exchange, a plurality of lines conforming to the ISDN basic interface or a primary rate interface being connected to an external side thereof, each of said ISDN terminals and said exchange being coupled to one of a plurality of local area networks, said method comprising the steps of:

• a) managing, in each of the passive buses, status of use of information channels in each of the passive buses by means of a communication server connected to the local area networks;
• b) sending, from said exchange, communication server command data showing that the ISDN terminals will use the information channels;
• c) updating, in each of the passive buses, management data showing the status of use of the information channels managed by said step a) in response to receipt of the command data;
• and
• d) sending, in each of the passive buses, updated management data showing, in each of the passive buses, the status of use of the information channels obtained after the command data is received to the ISDN terminals via the local area networks.

An ISDN system comprising:

• a plurality of ISDN terminals;
• a passive bus which conforms to an ISDN basic interface, said ISDN terminals being connected to said passive bus;
• a local area network coupling said ISDN terminals to each other;
• and
• a communication server coupled to said local area network,
• said communication server comprising:
• first means for managing status of use of information channels in the passive bus;
• second means, operatively coupled to said first means, for updating management data showing the status of use of the information channels in response to receipt of a command data showing that the ISDN terminals will use the information channels;
• and
• third means, operatively coupled to said first and second means, for sending updated management data showing the status of use of the information channels obtained after the command data is received to the ISDN terminals via the local area network.