Anybody used these the video conference between them and Polycom VC units (hardware video conferencing). IIUIC the UC360 is IP based into the 3300 and then out on a line (ISDN) until it reaches the far end VC unit? So as long as the remote VC unit understands the ISDN stuff it should work? (Its years since I did any of this and then it was H320 across a multipair cable from the conference room to the VC ubit and thence out to its own ISDN).