![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Turn off the printer.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Unplug the power cord from the electrical outlet, and then from the printer.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Unpack the internal solutions port (ISP) kit.
1 | ISP - RS-232C Serial Interface Card
- Parallel 1284-B Interface Card
- MarkNet™
N8230 Fiber Ethernet
|
2 | ISP extended cable |
3 | Mounting bracket |
4 | Thumbscrews |
5 | Housing |
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Remove the preinstalled interface cable from the ISP.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Install the ISP into its housing.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Secure the ISP in place, and then attach the ISP extended cable.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Using a flat‑head screwdriver, remove the controller board access cover.
Warning—Potential Damage:
Controller board electronic components are easily damaged by static electricity. Touch a metal surface on the printer before touching any controller board electronic components or connectors.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Attach the ISP kit to the printer.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Close the ISP kit, and then install the screw.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Connect the power cord to the printer, and then to the electrical outlet.
CAUTION—POTENTIAL INJURY: To avoid the risk of fire or electrical shock, connect the power cord to an appropriately rated and properly grounded electrical outlet that is near the product and easily accessible.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Turn on the printer.