Heads Up :
The post you are writing will appear in a public forum. Please ensure all content is appropriate for public consumption. Review the employee guidelines for the community here.
Try the 2500 series. You can configure them as terminal servers and can choose from models w/8 async ports or 16. I'm currently working on the AS2509-RJ. There are several documents on line to help w/setting it up. Here's a site to get you starte...