Anyone had any luck getting one of these installed. I have done plenty on the Comm Servers but am having no luck on my 1st 900 w/ SIP Stations. ESI's stance of "SIP will work we just don't know how" is growing frustrating. I would have to guess Polycom is one of the most sought after 3rd party devices to work on a PBX, so one would think ESI would know exactly how to make it cooperate with their PBX.