FAQs

FAQ/081 KAM-500 - Why can I not establish a reliable connection with an Ethernet switch?

August 18, 2020

Say you have a system with an Acra KAM-500 with a KAD/BCU/140 controller and a NET/SWI/003 for example and you are receiving the error message 'Could not establish or maintain reliable connection'. You have set the NET/SWI/003 ports to 100Mbps band can both of the devices. The likely reason for such an issue is the PC auto-negotiation.

In Windows 7 Control Panel, go to 'Change Adapter Settings' under 'Network and Sharing Center' and select the 'Ethernet NIC' connected to the NET/SWI/003.

Figure 1

Select 'Configure', then the 'Advanced' tab and select 'Speed & Duplex' and set the value to '100Mbps Full Duplex'.

Figure 2

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