Create the hyperlink like normal. Then in code view change select the anchor
tag <a> that is the link you want to change and alter the href attribute so
that it points to telnet://mytelnetserver or wherever it is you need to go.
Be aware though that this may not work as expected. Not every machine has a
telnet client. Some Windows versions come with a command-line telnet
interface, but the problem there is the command dialog will close pretty
much as soon as the connection is made or rejected. The user will need a
third-party telnet app installed to really work, though almost anyone doing
any serious telnet work will have their own choice app.
Hope this helps,
Mark Fitzpatrick
Microsoft MVP - FrontPage