Allied Telesis AT-TS90TR - Manual (Page 36)

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Appendix B
Topology
Standalone
The physical size and the number of topological elements in a 100BASE-
TX network is limited primarily by round-trip collision delay to 205
meters. That is while the 100BASE-TX has 10 times faster bit rate than
10BASE-T, its duration of the JAM sequence is, therefore, 10 times shorter
(note: A JAM is a signal, in Ethernet, generated by a network interface to
let other interfaces in the network know that a collision has happened.).
Since 100BASE-TX and 10BASE-T have little difference on the cable
propagation delay, however, for the devices at the maximum distance to
detect the collision, the diameter of 100BASE-TX has to be smaller.
Figure 11 represents a sample standalone topology. All eight 10BASE-T
ports are available via the front panel RJ-45 connectors.
Figure 11: TS90TR Sample
High and Low Band Width
Application in a Stand Alone
topology
RESET
100 BASE-TX
NETWORK LOAD
10BASE-T NETWORK PORTS (MDI-X) ETHERNET SWITCH with FAST ETHERNET
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
RS-232 TERMINAL PORT
LINK RCV COL
LINK RCV COL
MII POWER
GREEN - RECEIVE
TS90TR
100 BASE-TX
AMBER - COLLISION
TurboStack
FAULT
PORT A PORT B
GREEN - LINK
AT-TS90TR
Workgroup Hub
100BASE-TX Cables
10BASE-T Cables
Servers
Network
Management
Station
Workgroup Hub Workgroup Hub
Workgroup Hub