The Queen's University of Belfast
Parallel Computer Centre
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Network Topologies and Limitations
Network Topologies
Present and Future
- Operating ATM/SONET test network (USA)
- Possible future configuration circa 1998
Limitations
- Strictly hierarchical
- OC-12 only carries 4 OC-3s
- OC-48 only carries 4 OC-12s
- OC-12's 622Mbps not available as a single channel
- OC-48 cannot be a 2.4Gbps channel
- OC-3 has various forms
- 3 DS-3 channels
- OC-3C (C for concatenated) entire frame available as a sinle channel for FDDI or ATM
- OC-12C and OC-48C may be developed
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