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 · Executive boardroom.
Installed by year
Ports
2 portsRJ451XLR11 in
Underside
Position not stated
PoEAudio
Every port, in detail
| # | Port | Connector | Carries | Direction | Where |
|---|---|---|---|---|---|
| 1 | mic-16-pin mini-XLR connector (proprietary pinout, not standard 3-pin balanced audio XLR) linking the electronics interface module to the ceiling microphone sphere; a 6-pin mini-XLR cable is included in the box. | XLR | microphone | In | Underside |
| 2 | lan-1RJ-45 on the electronics interface module/wall plate; connects to the network/G7500 codec. Included cabling: a plenum-rated Ethernet cable (up to ~50 ft per reseller listings) plus a 7 ft shielded CAT5E cable between the wall plate and the interface module. | RJ45 | ethernet, PoE | Both ways | Position not stated |
Security support
Demo values- Firmware line
- Poly microphone firmware
- Security updates
- Until Jun 2031 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 5.02 BoardroomDUB 5.04 Briefing auditoriumNYC 22.01 Corncrake
Space types that use it
8 units in 4 spaces at 2 officesNotes
- Two parts: an electronics module (the size given) and a microphone sphere (53.3 mm) joined by a 6-pin mini-XLR cable.
- A reseller marks it end of life; HP publishes no date.
What the manufacturer doesn't say
- No device weight; only the 300 g package weight is published.
- No PoE standard, class or power draw stated.
- The RJ-45 port (lan-1) is drawn on a vertical side wall of the electronics enclosure, but the setup sheet and the Video Mode Administrator Guide 4.4 do not name that side (the enclosure has no defined front or rear), so its face and order are not set.
Sources
- Poly IP Ceiling Microphone Array (875S1AA) - ProductSheet
Dimensions, weight, power and interfaces - Polycom IP Ceiling Microphone for Poly G7500 - reseller product page
Supporting details - Poly IP Ceiling Microphone Array 875S1AA - reseller listing (cable lengths)
Supporting details - Poly IP Ceiling Microphone Array Setup Sheet (1725-85362-003A, Model P014)
Port labels, faces and panel layout (steps 6 and 13 show the microphone cable leaving the underside of the enclosure) - Poly Video Mode Administrator Guide 4.4.0
Port labels and panel layout (Poly IP Ceiling Microphone Ports figure and table)
Each model was read twice, independently, and the two readings reconciled against the manufacturer's text.