Terminal equipment identifier control circuit
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTakeo Nakabayashi, Hirohisa Machida
Life of this patent
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Abstract
This invention relates to a terminal identifier control circuit which provides automatic start of the check procedure to examine the unassigned/assigned distinction of a limited number of terminal identifiers by hardware, in a communications apparatus with a number of terminal equipment connected to a network.
Claims12
A terminal identifier control circuit in a communications apparatus for identifying a terminal unit, coupled to a network, by means of terminal identifiers, comprising:
- a memory, coupled to the terminal unit, having a number of address storage locations at least equal to a total number of the terminal identifiers to be assigned;
- means, coupled to said memory, for resetting said address storage locations of said memory to a first value representing an unassigned status;
- an address means, coupled to said memory, for giving said memory a terminal identifier as an address signal when assigning said terminal identifier to a terminal unit and for writing a second value, representing an assigned status, to said corresponding address of the memory;
- means, coupled to said memory, for detecting a condition when address storage locations of said memory have been written with said second value;
- and
- means, coupled to said memory and to said detecting means, for setting a check procedure starting signal when all of said address storage locations are detected as being written with said second value.
A control circuit for setting a check procedure signal when all of a plurality of terminal equipment identifiers have been assigned to one or more terminal equipment coupled in a network, comprising:
- a memory, coupled to each terminal equipment, said memory having a plurality of storage locations, each of said storage locations corresponding to a particular terminal equipment identifier to be assigned to said terminal equipment;
- means, coupled to each of said storage locations of each of said memories and responsive to a particular terminal equipment identifier to be assigned to a particular terminal equipment, for setting said storage location of said memory of said particular terminal equipment corresponding to said particular terminal equipment;
- means, coupled to said plurality of storage locations of said particular terminal equipment, for logically processing said storage locations of said terminal equipment;
- and
- means, coupled to said processing means, for setting the check procedure starting signal when all of said storage locations of said terminal equipment are set.
Dependencies are inferred from the claim text.