Hitachi, Ltd.

Hitachi Information Control Systems, Inc.

Keizou Mizuguchi

Satoshi Miyazaki

Michio Suzuki

Ryoichi Sasaki

Yasuhiko Nagai

Kazuo Yagyu

Hidenobu Taniguchi

Tatsuo Kawatobi

Goro Ikeba

Sinichi Kouyama

Sadao Niinobe

A network management/display processing system having a network manager and a display unit, which selects data necessary for display from management data collected from a comunication network to be managed, and converts the selected data into a display data including a display identifier which is provided by the network manager. The display unit receives the display data from the network manager and displays on its screen, a management object corresponding to the display identifier contained in the display data. An attribute value for displaying a state of the management object on the screen in a distinct color manner may be attached to the display data and transmitted from the network manager to the display unit.

Communication network management system for displaying operation states

There is a communication system comprising: an integrated services digital network (ISDN) having a plurality of information channels (Bch) and at least one control channel (Dch); a CPU (host computer) connected to said ISDN through a communication control processor (CCP); and a plurality of packet terminals connected to the ISDN. In the communication system, when a call request from the CPU or an incoming call request from one of the packet terminals is input to the CCP, if the B channel data link connection or the D channel data link connection for the packets has already been established between the CCP and the ISDN, the CCP selects the channel data link connection as a channel for communication with the packet terminal and multiplexes a plurality of calls to the same channel even if the other space B channels exist.

Data link control method and system for integrated services digital

Growing community of inventors

Kanagawa, Japan

Keizou Mizuguchi