Modular Routers
*
CSU/DSUs are removable expansion boards
Router Switching Circuitry
Port 1
CSU/DSU
(T1)
Port 2
CSU/DSU
(56 kbps)
Port 3
CSU/DSU
(T3)
Port 4
CSU/DSU
(56 kbps)
Modular Router
T1 Line
56 kbps Line
T3 Line
56 kbps Line
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