There are three models of internetwork applianes:

• TM0100
• TM0300
• TM1100
  

In general, the TM0100 is for small and home offices, the TM0300 is for larger offices or sites that heavily rely on VPN technologies, and the TM1100 is for large and/or high-bandwidth requirement locations.  Two TM1100's may be paired into an active/active configuration support fault tolerant networks that can survive any single equipment or network failure and still continue to function.

To help you decide which might be right for your application, you may want to check out the details of each product in the Products section.  You will also find a Comparison Chart in the Products section as well.