What it is for
Extra microphone that extends pickup beyond the video bar or codec: table or ceiling. Used in Briefing auditorium · Large meeting room.
Installed by year
Ports
1 portRJ451
Position not stated
PoE
Every port, in detail
| # | Port | Connector | Carries | Direction | Where |
|---|---|---|---|---|---|
| 1 | lan-1Single RJ-45 port carries both IP audio data (to/from the G7500 codec) and PoE power; a 25 ft (7.6 m) shielded CAT5E cable is included. | RJ45 | ethernet, PoE | Both ways | Position not stated |
Security support
Demo values- Firmware line
- Poly microphone firmware (updated with its system)
- Security updates
- Until Dec 2030 Demo value
- Report a flaw
- enable.hp.com/potentialsecurityvulnerability-report
The manufacturer sets these dates; Keia Atlas tracks them and does not vouch for them. A warning shows from 12 months before support ends.
Spaces using it
4 spacesDUB 3.03 HeronDUB 5.04 Briefing auditoriumNYC 20.04 HeronNYC 22.01 Corncrake
Space types that use it
7 units in 4 spaces at 2 officesNotes
- Part 874R3AA (also 2200-85250-001) is the Poly IP Table Microphone, a PoE network microphone made for Poly's G-series codecs.
- The retailer lists "802.1af", read here as 802.3af.
What the manufacturer doesn't say
- HP's own page for this part shows only packaging data; size, weight and power come from a retailer listing.
- The Video Mode Administrator Guide 4.4 figure (bottom view) draws the LLN port (lan-1) on the outer edge of one arm of the Y-shaped body, next to the micro-USB and pinhole reset ports. The guide does not say which side of the microphone that is and the device has no defined front or rear, so the face and order of lan-1 are not set. The datasheet and reseller pages show no port layout.
Sources
- Poly G7500 IP Table Microphone 874R3AA - B&H Photo Video product page
Supporting details - Poly G7500 IP Table Microphone (874R3AA) - HP product page
Specifications - Poly G7500 IP Table Microphone Array - reseller product page
Supporting details - Poly IP Table Microphone data sheet (part 2200-85250-001 / 874R3AA)
Dimensions, weight, power and interfaces - Poly Video Mode Administrator Guide 4.4.0
Port labels and panel layout (Poly IP Table Microphone Ports figure, bottom view, and table)
Each model was read twice, independently, and the two readings reconciled against the manufacturer's text.