Grandstream GSC3506-V2 SIP Speaker with PoE++

The Grandstream GSC3506-V2 is a revised version of the GSC3506 SIP intercom speaker, built around the same 30W high-fidelity HD driver and HD acoustic chamber but with a reworked set of connectors. Its 1×10/100Mbps Ethernet port carries documented support for 802.3af Class 3, 802.3at Class 4, and 802.3bt Class 6 (PoE++), and it adds a USB-A 2.0 port and a dedicated DC power port alongside a 2-pin switch-in input, an alarm-in input, and a 3-pin differential line-out. At 257.6mm by 118.1mm, it’s a larger unit than the compact GSC3505. Where the GSC3506 concentrates on call-handling depth, the GSC3506-V2’s changes sit on the power and connector side of the speaker.

What the GSC3506-V2 Does in Practice

The GSC3506-V2 handles SIP paging, multicast paging, and call-waiting with priority override over Opus and G.722 audio, the same paging foundation as the rest of the family. Its documented 802.3bt (PoE++) support means it can draw more power over a single Ethernet run than 802.3af or 802.3at alone would allow, which matters where a longer cable run or a heavier internal load pushes past what standard PoE delivers — and where PoE isn’t available at all, the dedicated DC power port gives it a second way to power up. The 3-pin differential line-out lets the speaker feed its audio into a separate amplifier or PA system rather than relying solely on its own driver, and the USB-A 2.0 port opens a wired option for accessories or servicing.

Where It Fits Across Saudi Facilities

Sites with longer PoE cable runs — large warehouses, multi-building compounds, or facilities where the switch closet sits far from the mounting point — benefit from the GSC3506-V2’s 802.3bt headroom, since higher PoE classes tolerate more voltage drop over distance than 802.3af. The DC power port also suits retrofit installs where a PoE switch upgrade isn’t in the budget but a local power source is available. Facilities that already run a centralized PA or amplifier system can use the differential line-out to bring the GSC3506-V2’s audio into that existing infrastructure instead of treating it as a standalone speaker.

Grandstream GSC3506-V2 vs. the Rest of the GSC35 Family

The GSC3506-V2 shares its 30W driver, HD acoustic chamber, and Opus/G.722 codec support with the GSC3506, and both cover SIP paging, multicast paging, and priority call-waiting override — that part of the two units genuinely overlaps. Where they diverge is the connector and power side: the GSC3506-V2 documents 802.3bt (PoE++) support, adds a USB-A port, a DC power port, and a differential line-out, and measures larger at 257.6mm by 118.1mm. Against the GSC3505, the GSC3506-V2 keeps the fixed-connection, higher-output profile of the 30W siblings rather than the GSC3505’s Wi-Fi-based flexibility on its smaller driver.

Deployment Notes

Because the GSC3506-V2 supports 802.3bt (PoE++) alongside 802.3af and 802.3at, an installer should confirm which PoE class the upstream switch actually delivers before relying on it as the sole power source, and use the DC power port where the switch can’t supply enough. The 3-pin differential line-out should be run to an amplifier or PA input at install time if the site plans to use it, and the mounting hole cut-out template included in the box is meant to be used before drilling, given the unit’s larger 257.6mm by 118.1mm footprint.

Package Contents

• GSC3506 V2 Speaker
• Mounting Hole Cut-Out Template
• Quick Installation Guide