Thanks Gerrya & WRichey
I knew I am gonna get this kind of response

but thought some kind member would share one.
I actually bought this on ebay and they look like do not know about it that much.
I asked for the firmware and they keep sending me the installation manual.
one of the member here confirmed that it is working on SIP hence I have recommended and bought it for a client.
I emailed Samsung and they asked me to call. I even called, left message but I have not heard anything yet from them.
Let hope anybody can share the firmware.