Terminal server recomendation

Terminal server and cisco switches don't have anything in common.
Just buy 1 or more powerfull server depending on the RDP workload (i assume we are talking about Windows/RDP) and just open the ports to have it communicate with the Internet.
Don't forget the CALs and proper selection ...either User if your work is dependant on users(1 user <--> multiple devices) or Device if its device oriented (1 device <--> many users)

when I mean terminal server, I guess a better word for it is console server.  I am looking to log into all my switches console ports from one central location, like the console ports.

I've been looking at the following so far, is one better than the other?
https://www.wti.com
https://www.perle.com
https://www.blackbox.com/
https://www.vertiv.com/

With WTI, they have a 5 year warranty on the hardware, and free lifetime tech support
With Perle, they have a lifetime warranty on product, but only 60 day free tech support, with additional cost for tech support per year

Price wise, I'm trying to stay under $3K, so I think WTI or Perle might be my best bet?  Any thoughts?

This is another case...i can't say that i have encountered something like this

I've always heard good things about Blackbox, but I assume they'd be out of your budget. Opengear would be borderline budgetwise. WTI, I've heard of people disliking the interface. If I went with a comparison of support/warranty scenarios, then I would be more prone to learn to WTI over Perle. Once a device is past 5 years old, manufacturing defects don't mean quite as much. That said, I'd try to see if you can get your hands on trying out each one's interfaces and see what might work for you.

In the past, when I've had specific hardware needs, I've used Digi. Don't know if these fit your needs but you could look at https://www.digi.com/products/networking/console-servers.

I wanted to share a serial modem on a network with Terminal Server users and they had a device that worked! They've got some pretty amazing solutions.

Thanks for the input, I settled with the Advocent 48 port, dual PS, dual NIC, it will meet my needs.