The SIP 2 x 2 Ceiling Tile Drop-In Speaker is a Power-over-Ethernet (PoE 802.3af/802.3at) and Voice-over-IP (VoIP) public address indoor speaker that easily connects into existing local area networks with a single CAT5/6 cable connection. The speaker is compatible with most IP PBX servers. In a non-SIP environment, the speaker is capable of playing audio from a multicast source.

• Simultaneous SIP and multicast
• Paging prioritization
• Supports user-uploadable ring and alert tones, and up to ten stored messages
• Support for security code to prevent unwanted SIP calls
• Can receive pages directly from Poly phones as well as other devices that can send standard multicast
• Loud/Night Ringer function - second SIP extension
• Support for 10 multicast paging groups

Apart from these, you can find manifold other smarter features and we at Cohesive Technologies give you the best options.