![](/images/new-backgrounds/1186348/186348121x1.webp)
Polycom RMX 4000 Hardware Guide
10Tighten the captive screws on the rear panel of the RMX 4000 that secure the
11Reconnect the cables.
12Turn ON the RMX 4000.
Replacing the RTM LAN
The RTM LAN card on the rear of the RMX 4000 provides connectivity to all the MCU modules. Use the following procedure to replace the RTM LAN card:
1Ensure that the power switch/circuit switch on the RMX 4000 is turned OFF (O).
2Remove the cables connected to the card.
3Unscrew the captive screws on the rear panel of the RMX 4000 that secure the RTM LAN card.
4Use the metal ejector levers to pull the RTM LAN card out of its slot in the backplane.
5Carefully slide the RTM LAN card out through the rear panel.
6On the card to be installed, move the ejector levers to their fully open position.
7Slide in the replacement RTM LAN card.
8Push the RTM LAN card firmly into the backplane, making sure it is properly seated in its slots.