Cisco 1841 rapid blicking SYS ACT light with WIFI active

I have a Cisco 1841 router with the WIFI A/B/G module.  I used Cisco Configuration Professional to configure an SSID which uses WPA.  After I have created this setup and delivered it to the running config, the SYS ACT light starts rapidly blinking non-stop.

If I remove the SSID setup then the SYS ACT light goes out.  Is this normal or is there something wrong?  I am still testing this out before I deploy it on my home network.  I don't have any other services running on it yet.  I did reboot the router after setting up the SSID.

The router is using 64 MB flash with 384 MB ram.  IOS version is 12.4(15)T17 and IOS image is c1841-adventerprisek9-mz.124-15.T17.bin.

WiFi module is HWIC-AP-AG-A and is in Slot 0.  Attached is a screenshot with the setup.

Cisco WiFi
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That is normal.
Summary of Cisco 1800 Series LED Indicators
SYS ACT(ive) - Blinking when any packets are transmitted or received on any WAN or LAN, or when monitoring system activity.
Transmitting SSID is network activity, so it is normal that SYS ACT is blinking.

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Dan CraciunIT ConsultantCommented:
SYS ACT is an indicator of SYStem ACTivity.
It just means that your unit is sending and receiving packages on the wireless interface.

bigeven2002Author Commented:
Thanks for the replies.  I knew that was the part of the purpose of the light.  Looks like I learned something new then about wireless though.  I didn't realize that even with no clients connected it would be sending out packets rapidly like that non-stop.  I'm glad to know there is nothing wrong.
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