Multiplex communications – Wide area network – Packet switching
Patent
1993-06-23
1995-02-07
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 66, H04L 1252
Patent
active
053880960
ABSTRACT:
A digital switch intended for use in a node in a circuit switched telecommunication network with a distributed switching function includes a switch memory, and a time slot counter, which is connectable to the switch memory and arranged to point out an address in the switch memory for cyclical writing of incoming data into the switch on this address. A control memory is arranged for controlling the sequence order for read out of data from the switch memory. The switch memory is connectable via an adapting device to a transmission medium, which is common to a number of nodes in the network. The time slot counter is connected via the adapting device to receive frame synchronization from the common transmission medium. The control memory is arranged for selecting time slots from the common transmission medium and generating read address to the switch memory. The control memory and the switch memory are realized with fewer memory cells than admitted by the address space.
REFERENCES:
patent: 4201889 (1980-05-01), Lawrence et al.
patent: 4488290 (1984-12-01), Dunn et al.
patent: 4545053 (1985-10-01), Raamot
patent: 4841522 (1989-06-01), Yamazaki
patent: 4941141 (1990-07-01), Hayano
patent: 5123012 (1992-06-01), Suzuki et al.
Olms Douglas W.
Patel Ajit
Telefonaktiebolaget L M Ericsson
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