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Model 6511RC Matrix Switch overview 15
Model 6511RC User Manual 1 • Introduction
Figure 2 shows the major functions and connections the Matrix Switch provides within the ForeFront chassis.
Each Model 6511RC enables service providers to perform SDH multiplexing and demultiplexing with any-to-
any timeslot mapping for up to 2048 DS0 channels. The on-board TDM multiplexer can map any of the 4096
DS0 timeslots on the TDM bus in the chassis midplane to any of the 2048 DS0s on the STM-1 uplink. Each
DS0 consists of a 64 kbps communication channel, or timeslot. The integrated SDH aggregator combines
DS0 channels into E1 signal streams, then maps those E1s into a STM-1 signal for high-speed transmission on
the SDH trunk.
Figure 2. Model 6511RC Matrix Switch major functions and interfaces
The Model 6511RC provides an Ethernet-switching fabric for packet-based management and user traffic tra-
versing the ForeFront chassis. The powerful Ethernet switch connects the high-speed packet-switched bus in
the ForeFront chassis midplane with two 10/100/1000 Ethernet uplinks. Offering fast Ethernet switching and
flexible timeslot aggregation, the Model 6511RC Matrix Switch enables the ForeFront AIS system to deliver a
surprisingly compact, high-speed trunking solution at very low cost.