Technical specifications
8.8 XR-300M PoE technical specifications
SCALANCE X-300
204 Operating Instructions, 02/2012, A5E01113043-12
8.8.4 Block architecture
Block architecture of the SCALANCE XR-300M PoE
The XR-300M PoE handles the Ethernet frame traffic of the 24 ports with the aid of three
switch blocks.
● The three switch blocks are connected in series (block 1 via block 2 to block 3).
● Gigabit wire speed is possible within a block (max. 8 ports per block).
● Between the blocks there is a bandwidth of 1 gigabit/s available,that must be shared by
all ports for frame traffic between the blocks.
When operating solely with Fast Ethernet (100 Mbps), the XR devices support full wire
speed via all blocks.
P1 P2
P3 P4
P5 P6
P7 P8
1
P1 P2
2
P1 P2
P9 P10
P11 P12
P13 P14
P15 P16
3
P1 P2
4
P1 P2
123
1 Gbit/s
1 Gbit/s
Figure 8-5 Block architecture of the XR324-4M PoE
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