Multiplex communications – Wide area network – Packet switching
Patent
1984-04-30
1986-08-26
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 94, 370 96, H04J 302
Patent
active
046086854
ABSTRACT:
A telecommunications network being operable as a packet switch and as a circuit switch is comprised of a plurality of units including a call controller unit. Each of the units is connected in common to data, address, and control leads of a bus, the data leads being commonly available for signal transmissions of both call control signals between the call controller unit and the other units and communications signals between calling and called ones of the other units. A bus controller is connected to the units by way of the address and control leads for arbitrating access to the data leads by the units, so that only one unit may transmit at any one time. The bus controller includes, a poll circuit for polling the units for asynchronous transmission requests, a grant circuit being responsive to the requests, for granting access to the data leads for an indefinite period of time as required for transmission of a data packet from one of the units, and a synchronous cycle circuit, being responsive to a synchronous request signal from any of the units, for generating a synchronous cycle signal for inhibiting data packet transmission and enabling synchronous data transmission via the data leads during a predetermined period of time.
REFERENCES:
patent: 3985962 (1976-10-01), Jones et al.
patent: 4154983 (1979-05-01), Pedersen
patent: 4251880 (1981-02-01), Baugh et al.
patent: 4380065 (1983-04-01), Hirtle et al.
patent: 4516239 (1985-05-01), Maxemchuk
Enns Frederick
Jain Prem C.
Northern Telecom Limited
Olms Douglas W.
LandOfFree
Packet and circuit switched communications network does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Packet and circuit switched communications network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Packet and circuit switched communications network will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2316026