Communications: electrical – Continuously variable indicating – With meter reading
Patent
1990-06-22
1992-10-06
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
340827, 379279, 371 82, 370 16, 370 601, 370 942, H04L 700
Patent
active
051535785
ABSTRACT:
An ATM switching system includes two ATM switches which are the same as each other. Each of the ATM switches includes a switch buffer, and a cell counter which indicates the number of cells in the switch buffer. Each of the ATM switches also includes a difference calculator, which calculates the difference between the number of cells in the two switch buffers when one of the ATM switches is changed from an out-of-service state to a slave mode. At this time, the other ATM switch operates in a master mode. Each of the ATM switches further includes a dummy cell generator, which generates a number of dummy cells which corresponds to the difference calculated by the difference calculator. The generated dummy cells are written into the switch buffer in the slave mode. When it is determined that when all of the dummy cells have been output from the switch buffer, the two ATM switches are syunchronized with each other.
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Aso Yasuhiro
Izawa Naoyuki
Murayama Masami
Uchida Yoshihiro
Fujitsu Limited
Yusko Donald J.
Zimmerman Brian
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