CyberData SIP Speaker with Talk-Back IPC 011394 The SIP 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 wi...

SIP/Multicast Talk-Back Speaker GSC3516 The GSC3516 is a SIP/Multicast Talk-Back Speaker that allows offices, schools, hospitals, apartments and more to build powerful voice intercom solutions that expand security and communi...