Grandstream GSC3516 SIP Talk-Back Speaker, 15 W, Mic Array, Wi-Fi, PoE

Overview

The Grandstream GSC3516 is a hands-free talk-back speaker for a room, corridor, classroom, hospital ward or lobby, so a call or announcement can be heard and answered without anyone picking up a phone. It combines a 15 W speaker with four microphones that pick up speech from 4.2 m away, connects over a network cable or Wi-Fi, and is powered through the network cable.

Is it right for you?

• Suits room and corridor intercom in offices, classrooms, hospital wards, reception areas and apartment lobbies, where a call from a phone or door station must be answered hands-free.
• Choose it over the GSC3506 V2 when people need to talk back; choose the GSC3506 V2 for one-way ceiling paging with more volume.
• It is for indoor use; the GSC3518HS is the outdoor horn speaker.
• Power is PoE only, so plan a PoE switch or injector even if the audio runs over Wi-Fi.

Key features

• 15 W speaker, 110 Hz to 20,000 Hz, up to 90 dBA at 1 W and 0.5 m, with acoustic echo cancellation so both sides can speak at once.
• Three directional beam-forming microphones plus one omnidirectional auxiliary microphone, 4.2 m pickup distance.
• Dual-band Wi-Fi (2.4 GHz and 5 GHz, 802.11 a/b/g/n/ac) and Bluetooth (2.1 + EDR and 5.0) for Bluetooth calls, plus one 10/100 Mbps PoE port.
• 2-pin multi-purpose input for a peripheral such as a call button.
• SIP paging, multicast paging, group paging, push-to-talk (PTT), call waiting with priority override and Bluetooth calls.
• Opus and G.722 wideband audio, plus G.711, G.726-32, iLBC, G.723 and G.729A/B.
• TLS, SRTP, HTTPS, 802.1x, secure boot and AES-256 encrypted configuration.
• 257 mm in diameter, 68.5 mm deep, 0.92 kg.

What else you need

• A PoE switch or injector (802.3af Class 3 or 802.3at Class 4): power is PoE only and there is no DC input.
• A SIP server or IP PBX, such as a Grandstream UCM (Unified Communications Manager), for intercom calls.
• Only if you want a call button on the wall: a peripheral for the 2-pin input.

Installation

An audio or network installer should fit it. It surface mounts on a wall or ceiling using the metal and plastic brackets in the box, with an anti-theft locking option. Run a PoE network cable to the position, even where the audio will use Wi-Fi, fix the bracket, hang the speaker and register it to the phone system. Operating range 0 to 45 °C.

Software and licences

Setup is through the local web interface, and provisioning and firmware updates are supported through GDMS (Grandstream Device Management System) or TR-069. It works alongside Grandstream IP phones and GDS door stations.

Before you buy

• Power is PoE only (802.3af Class 3 or 802.3at Class 4); there is no DC input.
• Needs a SIP server or IP PBX for intercom calls.
• Indoor use, rated 0 to 45 °C.