I have a Lexmark X3550 printer and need a wireless adapter card, but cannot find this anywhere since Lexmark no longer carries this part. Is there another wireless adapter card that would be compatable with this printer ir do you know where this part can still be purchased? Lexmark has this part listed as part number 14T0300.

The Lexmark X364DN does not have a wireless card, and can only be used through the USB cable, Ethernet or as a stand alone copier.

Configuring the optional internal wireless print server
If you purchased the optional internal wireless print server after your printer was already set up, follow these steps:
1 Install the internal wireless print server into the printer. For more information, see "Installing an optional internal
wireless print server" in the "Setting up the printer" chapter.
2 Click Start Programs or All Programs Lexmark 3500-4500 Series.
3 Click Wireless Setup.
4 Click Start.
5 Follow the instructions on the computer screen.
6 Click Finish to complete the installation.


Also here is the link to the setup guide and user manual
click here

configuring the wireless is in the setup guide

Contact Lexmark technical support to request(for free) for the installation disk for your Lexmark X3550 printer. You may need to know your printer's serial number found on the back of the it for Lexmark documentation purposes. Thanks.

yes you need wireless print server device and plug the printer cable to print server and start using by configuirng print router.
Hope this helps. Please rate my response.
Thanks.
Have a good day.

Reset the Network Adapter of the printer by pressing the Settings button on the Operator Panel on the printer> Network Setup> Wireless Setup> Reset Network Adapter to Defaults> Yes. Reinstall/reconfigure the printer for wireless connection. Make sure you are using the correct wireless network information and that the computer belongs to that network. Hope this helps. If you need more assistance, leave a comment and I'll get back to it. Thanks.

If you are trying to connect to a network printer you need to install a network printer NOT a PC install. You would have to browse for the "Remote" printer, from the CLIENT. The printer that is on the "Master" PC will have to have the printer already installed and "shared" as well, FIRST. Then you go to the remote and install a NETWORKED printer....find it on the network, and connect, it will actually get the drivers from the "Master" PC, see. Plus BOTH PC's will have to have a name password & and be on the same "Workgroup" as well. If you want to enable documents to be exchanged to print between PC's you will have to enable "Sharing" on each, Drive, or Folders as well, if you wish.
Tutorial here http://www.online-tech-tips.com/windows-xp/how-to-install-a-network-printer-on-your-home-or-office-network/

well considering the x3550 isnt a wireless printer you cant

http://www.provantage.com/lexmark-14t0300~7LEXP0M5.htm
Yes you would have to purchase the plug in module.
Thank you,
Lee

This is probably the Software Firewall on your laptop

you should probably tell your firewall software that you have an internal network (Laptop-desktop-printer) you should add the IP range of the wireless network as a trusted network.

I think you can use this wireless card, not sure which printer models it works with though.

http://www.lexmarkonline.co.uk/product_info.php/tab/Customer_reviews/info/p449_Lexmark-N2050-802-11b-g-Wireless-Network-Card.html#tabs