Siemens CP 1515 - Manual (Page 26)

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26 Industrial Ethernet Wireless LAN RLM Manager, CP 1515 Manager
C79000-G8976-C171-01
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In a stand alone configuration ( Figure 2 ), the Radio Link Module (RLM) will
function as a relay RLM, that will forward the data communication from one
computer to another within the same wireless cell.
This is the quickest and easiest way to set up a small wireless LAN
infrastructure.
The mobile stations communicate via RLM.
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