Siemens CP 1515 - Manual (Page 29)

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Industrial Ethernet Wireless LAN RLM Manager, CP 1515 Manager
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The stations are capable of switching their operating frequency channel
dynamically when roaming between Access Points RLMs that have been
configured to use different radio channels.
Using different channels enables you to optimize wireless performance,
assigning different frequency channels to neighboring Access Points RLMs.
Multiple frequency configurations may prove very useful in environments
where:
• A high concentration of wireless stations are operational.
• The stations experience a performance decrease in terms of network
response times as a result of the collision avoidance protocol (for more
information, see “
RTS/CTS Medium Reservation (page 131) ” .