The CyberData SIP Speaker with Talk-Back (Model 011394) is a high-quality Power-over-Ethernet (PoE 802.3af/802.3at) and Voice-over-IP (VoIP) indoor public address speaker designed for seamless integration into existing Ethernet networks via a single CAT5/CAT6 cable. Featuring *full-duplex talk-back capability*, this device enables two-way conversations with configurable echo cancellation, ideal for offices, schools, and industrial environments.

Key functionalities include simultaneous SIP and multicast paging support, allowing up to 10 multicast paging groups to broadcast messages independently of SIP registration. Adaptive half-duplex audio is offered with configurable VOX and push-to-talk options from both speaker side and remote devices. Ambient noise compensation automatically adjusts the volume according to environmental sound levels, ensuring clarity at all times.

Security and management features provide TLS 1.2 encryption, SRTP, HTTPS configuration interface, and autoprovisioning via HTTP/HTTPS/TFTP. The speaker supports VLAN tagging (802.1q) and event generation to monitor device health and network status. It can connect to multiple SIP servers for redundancy and supports paging directly from Poly phones as well as other multicast-capable equipment.

Additional hardware features include an onboard relay (1A @ 30 VDC), line-out connection, and the ability to drive an external analog speaker to extend coverage. The device supports a loud/night ringer function, security code protection, configurable ring tones, and optional auxiliary visual strobe notifications to meet ADA compliance.

With compact dimensions (230 mm grill diameter, 76.11 mm can depth) and a robust operating temperature range (-40°C to 55°C), this speaker is well-suited for a variety of indoor environments. Certifications include CE, RoHS, FCC, and Industry Canada. Backed by a 5-year limited warranty, the CyberData SIP Speaker with Talk-Back delivers reliable, secure, and flexible public address and communication capabilities.

Official Product Page: [CyberData 011394 SIP Speaker](https://www.cyberdata.net/products/011394)