deviceControlConnectionDownRTS 1.3.6.1.4.1.8691.2.8.1.4.1.2.1.1.1.7

For some applications, serial devices must obtain the Ethernet link status by reading the RTS signal from the NPort 6000 series device server. If this setting is set to 'always low,' RTS will change its state to low if the Ethernet link is off.