This system assumes by default that you are using a vt100 terminal. In place of 'sun' you can specify other terminal types, e.g., ansi, z19, wyse50, and others.
Terminal names are case-sensitive.
To make this happen automatically each time you log in, you can put the setenv command near the end of your .login file. If your terminal is not 80 columns by 24 rows in size, you might also need to tell the system its size. This can be done automatically at each login if you include the above command in your .login file. Due to the overhead involved in keeping multiple machines updated, termcap entries with minor modifications are rarely officially added at a2i. However, it's very easy for users to define their own as needed.