| 摘要 |
A layered bandwidth management system for transporting both STM and ATM traffic from customer circuit elements over a synchronous digital hierarchical (SDH (SONET)) transport network comprises a hybrid transport device for separately transporting STM and ATM traffic over separate first physical channels, the physical channels having fixed bandwidth allocations; a first bandwidth control device responsive to STM traffic contained in the first physical channel for directing STM traffic in fixed bandwidth allocations to a further destination; and, a second bandwidth control device responsive to ATM traffic contained in a separate first physical channel for switching the ATM traffic to a further destination, the second bandwidth control device capable of directing ATM traffic to the first physical channels for more efficient physical channel bandwidth utilization.
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