The Grandstream GSC3516 is a SIP/Multicast Talk-Back Speaker designed to provide high-quality two-way voice communication in various environments such as offices, schools, hospitals, and apartments. It integrates seamlessly with Grandstream’s ecosystem, offering robust features for enhanced communication and security.
🔊 Audio & Microphone
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Speaker: 15W high-fidelity HD speaker with an acoustic chamber for clear audio output.
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Microphones:
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3 directional microphones with Multichannel Microphone Array Design (MMAD) and beamforming capabilities.
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1 omnidirectional auxiliary microphone.
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Combined pickup range of up to 4.2 meters.
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Audio Codecs Supported: G.711μ/a, G.722 (wide-band), G.726-32, iLBC, Opus, G.723, G.729A/B.
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Audio Features: Full-duplex speakerphone with HD acoustic chamber and advanced acoustic echo cancellation.
🌐 Network & Connectivity
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Wi-Fi: Integrated dual-band 802.11 a/b/g/n/ac Wi-Fi for flexible wireless connectivity.
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Bluetooth: Built-in Bluetooth 4.0 + EDR for connecting to various peripherals.
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Ethernet: One 10/100 Mbps network port with Power over Ethernet (PoE/PoE+) support for simplified installation.
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Auxiliary Port: 2-pin multi-purpose input to support peripherals such as call buttons.
📞 Telephony & Paging Features
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SIP Support: Compliant with SIP RFC3261 standard.
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Paging Capabilities: Supports SIP paging, multicast paging, group paging, push-to-talk (PTT), and call-waiting with priority override.
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Bluetooth SCO Call: Supports Bluetooth Synchronous Connection-Oriented (SCO) calls.
🔒 Security Features
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Access Control: Built-in whitelist, blacklist, and greylist functionalities to manage and block unwanted calls.
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Encryption & Authentication:
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256-bit AES encrypted configuration files.
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TLS and SRTP encryption technologies.
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MD5 and MD5-sess based authentication.
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802.1x media access control.
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⚙️ Additional Features
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Quality of Service (QoS): Supports Layer 2 QoS (802.1Q, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS).
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Provisioning & Management: Firmware upgrade via TFTP/HTTP/HTTPS or local HTTP upload; mass provisioning using AES encrypted XML configuration files.
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Operating System: Linux-based.
