OK. Let's first talk about the "Call OBi" link at the portal's home page, without login.
If I click this link, I get a drop-down. In the "dial" text input box, what do I input?
* Any OBI number, and shall I add the "**9" prefix or not? or,
* The soft phone number for any portal-hosted OBI unit, and shall I add the "**9" prefix or not? or,
* Any PSTN telephone number, or;
* Any SIP URL?
I tried all of the above. But nothing happened.