Hi mcfrenzy36,
Is it necessary that they continue using Tera Term? According to some posts on the Tera Term forums, it would not be the simplest way to integrate with TestStand. There are other serial communication .dll packages which you could easily command.
Here is an NI forum post from someone who similarly wanted to control Tera Term from LabVIEW. Ultimately, it was decided to just use an example VI which accomplishes serial communication. If LabVIEW is an option for you, then using it as a code module in TestStand should be a breeze. There are other suggestions in that thread which may be helpful to you.
Thanks,
KyleP
Applications Engineer
National Instruments