- SIP compliant- SIP endpoint or multicast group member- SIP/Multicast: SIP page, SIP page and zoned multicast receive- Plays audio from standard multicast sources- Compatible with Polycom multicast paging- Red Page/Status LED indicator- Network downloadable firmware- Support for access code to prevent unwanted SIP calls- Network remote volume control- Paging prioritization- Programmable pre-page alert tone- Powerful 70V amplifier drives up to 250 Watt load- Door chime trigger input- Auxiliary and backgroun