I have an Obi110 with pstn and gv on sp1. The setup is the standard setup that is created through the website. Everything works great except if the pstn is off hook, a person calling the pstn line gets a ring tone rather then a busy signal. The pstn line is simple measured service without voicemail or call waiting. I unchecked both boxes for CallWaitingEnable, saved and rebooted directly from the web interface but a call will still get a ring tone when they should get a busy signal.
To make sure there wasn't something wrong with the telephone line, I directly connected an off hook phone to the pstn line. A busy signal was generated for an incoming call.
How do I get the Obi to generate a busy signal?