Additional connection TG862G92 appears after connected to Wi-Fi network?

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Using a Wireless-G Broadband Router WRT54GL. One wired connection and
Wi-Fi is enabled.  

On a Wi-Fi connection, when Windows 8.1 boots, it does not automatically
connect.  

After selecting our network and connecting by clicking on "Connect" it  
connects just fine but other connections show up immediately after that.
The most common additional connection that magically appears after  
connecting to our wireless network is "TG862G92".  

Should I be concerned?  

Is this just an appearance problem to do with manually connecting that I
didn't notice when automatically connecting?  

The DHCP Active IP Table appears to show the correct connections to the  
router.  

Thanks.  

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