Grandstream GSC3506 V2 SIP Paging Speaker, 30 W In-Ceiling, PoE++

Overview

The Grandstream GSC3506 V2 is a ceiling speaker for announcements, bells and background audio in an office, school, hospital, warehouse or apartment block. It plays over the normal data network rather than a separate PA cable run: it registers to a phone system (SIP) or listens to multicast streams, and it can be powered through the same network cable. It has no microphone, so it is for one-way paging only. V2 is the second hardware version, adding PoE++ input, a 24 V DC input and a differential line out.

Is it right for you?

• Suits public address and paging in offices, schools, hospitals, warehouses and apartment blocks where announcements should reach a ceiling speaker over the network.
• It is one-way only. For rooms where staff need to answer back, choose the GSC3516, which has a microphone array.
• It needs a false ceiling with a 230 mm cut-out; the GSC3518HS is the outdoor horn speaker for open areas.
• For SIP paging you need an IP PBX or SIP server; multicast paging works from any compatible multicast source.

Key features

• 30 W coaxial driver, 110 Hz to 20,000 Hz, sensitivity up to 95 dBA at 1 W and 1 m, maximum sound pressure level 99 dB, so announcements carry across a large room.
• SIP paging, multicast paging, group paging, push-to-talk (PTT) and call waiting with priority override, so an urgent announcement can cut in.
• Powered by PoE (IEEE 802.3af Class 3, 802.3at Class 4 or 802.3bt Class 6) or by 24 V DC 2.5 A on a 2-pin input.
• 2-pin switch-in input, 2-pin alarm-in input and a 3-pin differential line out for a further amplifier or speaker.
• USB 2.0 port for external storage, for example stored announcement files.
• Opus, G.722 wideband, G.711, G.726-32, iLBC, G.723 and G.729A/B codecs.
• TLS, SRTP, HTTPS, 802.1x, secure boot and AES-256 encrypted configuration files.
• One 10/100 Mbps network port.

What else you need

• A network cable to the ceiling position, from a PoE switch or injector (802.3af Class 3, 802.3at Class 4 or 802.3bt Class 6). Without PoE, it needs a 24 V DC 2.5 A supply.
• For SIP paging: an IP PBX or SIP server, for example a Grandstream UCM (Unified Communications Manager). Multicast paging needs a compatible multicast source.
• Only if the ceiling tile cannot carry the speaker’s weight but the ceiling grid can: the Ceiling Bracket V2, which is sold separately.

Installation

An audio or network installer should fit it. The unit is 257.5 mm in diameter, 118 mm deep and weighs 2.14 kg, so check what the ceiling can carry: use the Ceiling Bracket V2 when the ceiling tile can carry 4 kg or less. A cut-out template for the 230 mm ceiling hole is included. Run the network cable to the position, cut the hole, connect PoE or 24 V DC and any switch, alarm or line-out wiring, then register the speaker to the phone system or set the multicast addresses. Operating range 0 to 45 °C.

Software and licences

Uses standard SIP (RFC 3261). Setup is through the local web UI, and provisioning and firmware updates are supported through GDMS (Grandstream Device Management System), TR-069 or an encrypted XML file.

Before you buy

• No microphone: one-way paging only.
• The ceiling bracket is optional and sold separately.
• Without PoE it needs a 24 V DC 2.5 A supply.
• Needs a 230 mm ceiling cut-out and 118 mm of depth above the ceiling.