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S3C2500B
IOM2 CONTROLLER
9.3.1 B CHANNELS
The B1 and B2 provide two clear 64 Kbit/s user data channels to/from the network.
9.3.2 D CHANNEL
The 16 Kbit/s D channel provides a connection between the layer-2 and layer-1 components
9.3.3 MONITOR CHANNELS
There are two programming channels, monitors 0 and 1, Each channel has an associated pair of MX and MR
handshake bits that control data flow.
9.3.4 COMMAND AND INDICATE CHANNELS
Three Command and Indicate channels, C/I0, C/I1, and C/I2 provide real-time status between devices connected
via the IOM2 bus.
9.3.5 INTERCOMMUNICATION CHANNELS
Two intercommunication data channels, IC1 and IC2 provide 64 Kbit/s data paths between user devices.
9.3.6 TIC BUS
One D-channel accesses bus, TIC bus. The TIC function is implemented using 4 bits of the C/I2 channel, and
allows multiple layer2 devices to individually gain access to the D and C/I channels located in the first sub-frame.
9-3
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