IP Telephony & SIP Communication Systems · Guangzhou, China
Scenarios · industry
A factory paging system has to be heard over production, understood by people wearing hearing protection, and trusted as the route for an emergency announcement — and it usually has to coexist with a radio fleet, an old amplifier line and a set of alarm devices on the plant. The design on this page is the paging and intercom tier of that problem: SIP speakers and horns for coverage, gateways to bring the existing speaker line along, a console for dispatch, relay and short-circuit interfaces for plant signals, and radio integration where UHF handsets are already in use. Industry is one of the verticals named in the paging and intercom material, and industrial broadcast and intercom is a named scenario. NEXVIA designs, manufactures, supplies and commissions the system; the terminals and gateways are manufactured by NEXVIA.
Size a factory paging system by zones and by ambient noise, not by floor area. A plant with a machine shop, an assembly hall, a packing area, a yard, a canteen and offices is 6 zones before any aisle coverage; the speaker family supports up to 20 multicast zones with prioritisation, so the zoning is a design choice rather than a hardware limit. Behind it, one PBX publishes 62 SIP trunks on the OM50G and 496 on the OM200G, which is what carries the paging, the telephony and the gate calls together.
Three published power figures carry the audio design: the A233 horn at 30 W rated output for the yard and the loading areas, the A212 wall speaker at 8 Ω with up to 15 W class D output (PoE 8 W / PoE+ 15 W) and talkback, and the FH-S01 ceiling speaker at up to 20 W with a built-in class D amplifier on PoE to IEEE 802.3af. The A201 ceiling figure is printed two ways in the source, so its wattage is confirmed on the quotation rather than quoted from this page.
The plant side is where industrial paging differs from office paging. The A330i console takes 8 short-circuit inputs, 1 output and an RS-485 interface so alarm and control signals land at the dispatch desk; the A513W carries relay in and out for a PIR sensor, infrared sensor or strobe light; and the W712 puts one analog or DMR II radio on the same system as SIP calls, with group calls between them. Prices are not published on this site — every plant is quoted per zone count, radio channel count and cable condition.
Intelligibility is the whole job. Published output figures, environmental noise detection, zoning with prioritisation and remote volume adjustment per device are the tools; the ambient measurement at survey is the input.
Most plants have an analog paging line and a maintenance contract on it. The PA3 and PA2S gateways let that line stay while the new system grows zone by zone, which keeps the project inside one budget year.
Until the W712 puts a radio channel onto the telephone system, the yard and the control room cannot talk. Group calls between radios and SIP phones are the documented behaviour that closes that gap, with recording for both.
An alarm path is only useful if it is tested. Short-circuit inputs at the console and the endpoints, self-test and monitoring on the speakers, and audio archiving give the plant a way to test and to prove what happened.
| Size band | System | Devices | Notes |
|---|---|---|---|
| Workshop or light industrial unit — up to 6 zones | OM20G — 24 SIP trunks; 4 analog ports for a legacy line | 6–12 speakers (A212 / A201 indoors, A233 outdoors), 1 console (X210i), 2–4 wall handsets (V60G), 2–4 portable handsets | The desktop chassis covers a single cabinet installation, and the OM20G is the only model that can dial out through a 3G/4G USB modem for a site whose line is unreliable. |
| Single factory or production hall — 6 to 12 zones | OM50G — 62 SIP trunks; up to 12 analog ports across 3 interface cards | Speakers per zone indoors and outdoors, 1–2 gateways for the old amplifier line, 1 dispatch console, 4–8 portable handsets, 1 radio gateway per channel | Ring groups hold up to 40 extensions on this model, so a shift-change call or an alarm group that rings the dispatch desk, the gatehouse and a handset fits comfortably. |
| Multi-line plant or industrial estate — 12 to 20 zones | OM200G — 496 SIP trunks; up to 96 analog ports on 24-line interface cards | Speakers per line and per outdoor area, dispatch consoles per control point, radio gateways per channel, handsets per shift, plant-room extensions | 4 hot-swap card slots, gigabit Ethernet and single or dual AC/DC power; up to 32 departments for group pickup and up to 60 extensions in a ring group at this size. |
| Multi-site industrial group | OM1000-UC — 1000 SIP trunks, up to 200 concurrent calls per trunk | The per-site counts repeated, a shared dial plan, extension ranges per site, DID numbers per site where departments publish direct lines | SIP only, with dual hot standby (3 fixed IP addresses) and multi-site networking using unique or repeatable extension numbering. |
| Plant keeping its existing amplifier and speaker lines | OM50G or OM200G — 62 or 496 SIP trunks | PA3 or PA2S gateways per amplifier position, with new SIP speakers added zone by zone as the budget allows | The IP endpoint tier is stated to bridge legacy paging systems into the IP environment. PA3 adds line in, USB 2.0 and TF storage plus camera linkage; PA2S stays compact with an SOS call key and a built-in relay. |
| Plant where UHF radios are already in use | OM50G or OM200G — 62 or 496 SIP trunks | W712 RoIP gateway per radio channel, with the existing radios and the SIP handsets in the same talk groups | The W712 integrates a UHF 400–470 MHz radio module and supports one analog or DMR II radio plus one SIP call, with group calls between them and recording to a TF card up to 128 GB. Record the radio make, model and channel plan at survey. |
| Model | Where it goes | Published output and capability | Power and rating |
|---|---|---|---|
| A233 | Yard, loading areas, external walls | Horn speaker with 30 W rated output, high sound clarity and a built-in microphone for system self-test, monitoring, environmental noise detection, volume adjustment and two-way voice | IP66; PoE, PoE+ or DC; up to 20 multicast zones |
| A212 | Production halls, workshops, canteen walls | 2-way coaxial speaker with 8 Ω and up to 15 W class D output; talkback through an omnidirectional microphone; alarm linkage; offline timed broadcast | 10/100 Mbps Ethernet with integrated PoE (PoE 8 W / PoE+ 15 W); up to 20 multicast zones with prioritisation; wall mount with optional angle bracket |
| A201 | Ceilings in halls, offices and control rooms | Ceiling SIP speaker with a built-in microphone, system self-test, monitoring, environmental noise detection, two-way voice and offline timed broadcast | PoE, PoE+ or DC; the rated output is printed two ways in the source, so the wattage is confirmed on the quotation |
| FH-S01 | Ceiling coverage where a stronger amplifier is needed | Up to 20 W with a built-in class D amplifier, talkback, a customisable WAV for emergency notification and alarm, and linkage with security alarming devices | PoE to IEEE 802.3af; up to 20 multicast zones with prioritisation; all-in-one codec, amplifier and speaker |
| A513W | Unattended area needing both a camera and a speaker | All-in-one SIP speaker with a built-in 4 MP HD camera with IR night vision, built-in microphones, H.264, dual-band 2.4G/5G Wi-Fi and BLE; relay in and out for a PIR sensor, infrared sensor or strobe light | IP66; PoE or DC; up to 10 W on a DC supply |
| PA2S | Bridging an existing amplifier or speaker line | SIP intercom and paging gateway: 10–30 W mono output adapting to the input voltage, line out for an external active speaker, SOS call key, 1 short-circuit in and 1 out with a built-in relay, recording output | PoE to IEEE 802.3af or 12–24 V 2 A DC; −30 °C to 60 °C |
| PA3 | Larger legacy system with scheduled audio and camera linkage | SIP paging gateway: 10–30 W mono output, line out, SOS call key, line in 3.5 mm, USB 2.0 and TF card, analog output to passive speakers or amplifiers, video linkage with an IP camera | PoE / PoE+ (IEEE 802.3at, published as PoE Class 4) or 12–24 V 2 A DC; −20 °C to 50 °C |
| A330i / X210i | Dispatch, control room and security desk | A330i: 10.1-inch touchscreen, 116 DSS keys, 92 dB speaker, 8 short-circuit inputs, 1 output and 1 RS-485 interface, built-in broadcast system, Android 14. X210i: 106 DSS keys across three screens with a gooseneck microphone | Dual Gigabit ports with integrated PoE; terminals used with the console are scanned and provisioned automatically |
| A12V / A11V | Gate, yard entrance and external call positions | A12V: 4 MP camera with IR night vision, 10W speaker with AEC, 2 short-circuit inputs and 2 outputs, anti-tamper alarm. A11V: 4 MP camera, 5W speaker, 2 in / 1 out | IP66 and IK10, −40 °C to 70 °C; ONVIF and RTSP on the video models |
| W712 | Radio room, one per channel | RoIP gateway with a UHF 400–470 MHz radio module; one analog or DMR II radio plus one SIP call; group calls between radios and SIP phones; call recording and logs on a TF card up to 128 GB or USB | Network plus UHF radio; SIP standard protocol; web deployment and management; trans-regional communication via DSS speed-dial keys |
| W611W / W620W | Supervisors, marshals and maintenance staff | 16 DSS keys plus a configurable push-to-talk key. W611W: IP67, 1900 mAh, up to 9 h talk / 200 h standby. W620W: 3000 mAh, up to 13 h / 240 h, dual microphones, H.264 video preview | Wi-Fi 6 dual-band 2.4G and 5G; Bluetooth 5.0 |
| Requirement | Conventional factory PA amplifier | This IP design | What changes operationally |
|---|---|---|---|
| Zone control | Rotary zone switches on the amplifier, one position per circuit | Up to 20 multicast zones with prioritisation, addressed from a console or an IP phone; dynamic zone control and remote volume adjustment in the advanced tier | Any combination of areas can be addressed from a screen, and levels can be trimmed per device |
| Scheduled announcements | A timer or a clock card in the amplifier rack | Scheduled broadcasting with custom time templates, plus offline timed broadcast held on the A201 and A212 speakers; real-time text-to-speech for typed messages | The timetable is a configuration and survives a network interruption on the speaker side |
| Reaching people away from a speaker | Nothing: the announcement is the only channel | Portable Wi-Fi 6 handsets with a push-to-talk key, and the W712 gateway putting existing radios into the same system as SIP calls | The announcement and the two-way conversation share one system |
| Alarm and control signals | A separate alarm panel with its own sounders | Short-circuit inputs and relay outputs at the console and the endpoints: A330i 8 in / 1 out / RS-485, A12V 2 in / 2 out, PA2S 1 in / 1 out with a built-in relay, A513W relay in and out | Plant signals, strobes and alarm buttons are part of the same installation |
| The existing speaker line | Replace the amplifier and the line together | PA3 or PA2S gateways drive passive speakers and legacy analog horn speakers with a 10–30 W mono output and a line out for an external amplifier | The changeover happens zone by zone in planned shutdown windows |
| Records | None | Audio archiving of SIP paging, intercom and calls where the paging tier provides it; radio and SIP call recording on the W712; call detail records to a server on port 1809 | An announcement or an alarm event can be reviewed afterwards |
| Video linkage | Not possible without a separate system | ONVIF integration with third-party VMS platforms; AI camera events such as intrusion or loitering can trigger pre-recorded broadcasts; A513W combines a 4 MP IR camera and an IP66 speaker | The camera event and the announcement are one action |
| Area | Device | Note |
|---|---|---|
| Yard, loading area and external plant | A233 horn speaker | IP66 horn with 30 W rated output and a built-in microphone for system self-test, monitoring, environmental noise detection, volume adjustment and two-way voice; part of a family supporting up to 20 multicast zones with prioritisation. |
| Production halls and workshops | A212 wall speaker or A201 ceiling speaker | A212: 8 Ω with up to 15 W class D output, talkback through an omnidirectional microphone and alarm linkage (PoE 8 W / PoE+ 15 W). A201: ceiling two-way audio with self-test and offline timed broadcast, its rated output confirmed on the quotation because the source prints it two ways. |
| Halls needing a stronger ceiling output | FH-S01 ceiling speaker | Up to 20 W with a built-in class D amplifier, talkback, a customisable WAV for emergency notification and linkage with security alarming devices, on PoE to IEEE 802.3af. |
| Unattended areas with a camera position | A513W video speaker | IP66 all-in-one SIP speaker with a 4 MP IR camera, built-in microphones, H.264, dual-band Wi-Fi and BLE, relay in and out for a PIR sensor, infrared sensor or strobe light, and up to 10 W on a DC supply. |
| Legacy amplifier and speaker line | PA2S or PA3 SIP paging gateway | Both publish a 10–30 W mono output that adapts to the input voltage and a line out for an external active speaker or amplifier; PA2S adds a built-in relay with 1 in and 1 out and an SOS call key, PA3 adds line in, USB 2.0, TF storage and camera linkage. |
| Gates and external call positions | A12V outdoor intercom (A11V for a sheltered goods entrance) | A12V: IP66 and IK10 from −40 °C to 70 °C, 4 MP camera with IR night vision, 10W speaker with AEC and 2 in / 2 out. A11V: 4 MP camera, 5W speaker, 2 in / 1 out. |
| Dispatch, control room and radio room | A330i console with a W712 RoIP gateway; W611W / W620W handsets for staff on the move | A330i: 116 DSS keys, 92 dB speaker, 8 short-circuit inputs, 1 output and an RS-485 interface. W712: UHF 400–470 MHz radio module, one analog or DMR II radio plus one SIP call with group calls and recording. Handsets add a push-to-talk key over Wi-Fi 6. |
Enough that a message goes where it is relevant and nowhere else. A typical plant starts at 6 zones — machine shop, assembly, packing, yard, canteen and offices — and grows as lines are added; the speaker family supports up to 20 multicast zones with prioritisation.
Bridge them. The PA3 and PA2S gateways publish a 10–30 W mono output that adapts to the input voltage and a line out for an external active speaker or amplifier, so the existing passive speakers and horn speakers continue to work while new SIP speakers are added zone by zone.
Yes, through the W712 RoIP gateway. It integrates a UHF 400–470 MHz radio module and supports one connection of an analog or DMR II digital radio plus one SIP call, with group calls between radios and SIP phones.
Through the same system, with priority. One-key alarm activation, alarm light flashing and simultaneous calling to the management unit are stated for the IP endpoint tier, and zones can be addressed together with prioritisation over routine announcements.
With the recording features published for the tiers: audio archiving automatically records SIP paging, intercom and calls and makes them available online for review or download where the advanced paging tier provides it, and the W712 records radio and SIP calls to a TF card up to 128 GB or USB storage.
The material lists industrial and mining sites, transport and rail, energy and power, education, finance, correctional facilities, medical sites, highways and unattended sites among the target environments, with industrial broadcast and intercom named as a scenario in its own right.
Analog lines on FXO ports keep working directly, outbound SIP calls can fall back to an analog line when the trunk fails, and speakers with offline timed broadcast keep their scheduled messages running on their own.
Typical industrial zoning and the device for each area
| Area | Device | Zone behaviour | Why this device |
|---|---|---|---|
| Yard and loading bank | A233 horn | Own zone, outdoor rated | 30 W rated output at IP66 with environmental noise detection |
| Production hall | A212 wall or FH-S01 ceiling | One zone per line or per bay | 15 W class D with talkback, or 20 W on PoE 802.3af where more output is needed |
| Offices and control room | A201 ceiling | Own zone with a lower level | Even indoor coverage with two-way voice and offline timed broadcast |
| Canteen and welfare areas | A212 wall | Own zone with a local volume knob | Talkback and a volume control staff can reach |
| Unattended area or store | A513W video speaker | Own zone with relay contacts for a strobe | Camera and speaker in one IP66 enclosure with relay in and out |
| Gates and goods entrances | A12V / A11V | Extension in the security call group | Camera, 10W speaker and 2 in / 2 out for the barrier |
| Legacy buildings on an amplifier line | PA2S / PA3 gateway | Bridged zone per amplifier | 10–30 W mono output and a line out for the existing rack |
| Control room and dispatch | A330i console | Paging control and alarm display | 116 DSS keys, 92 dB speaker, 8 in / 1 out / RS-485 |
| Supervisors and maintenance | W611W / W620W, or the W712 radio gateway | Portable extension with push-to-talk, or radio talk groups | Reaches the person, and joins the existing radio fleet to the system |
The zone plan is the document that keeps the system usable: without it, every announcement becomes plant-wide and employees stop listening to any of them.
Where a plant paging system also carries emergency announcements, the interface to the fire detection system and the priority of an alarm announcement over a routine one are regulated locally. The published capabilities that matter are up to 20 multicast zones with prioritisation, one-key alarm activation, alarm light flashing, simultaneous calling to the management unit, and short-circuit inputs on consoles and gateways. Have the fire interface designed and signed off by the plant fire contractor, and keep the announcement path testable: speakers on the range carry self-test, monitoring and environmental noise detection, which is how the installation is kept honest between inspections. This page makes no certification claim.
In a production hall the announcement has to be intelligible above machinery, and the people who must hear it are often wearing hearing protection. Design the coverage from the measured ambient level, not from a rule of thumb: the published figures are 30 W rated output on the A233 horn, up to 15 W class D on the A212, up to 20 W on the FH-S01 and up to 10 W on the A513W at DC, with environmental noise detection and remote volume adjustment available. Mounting heights, the zoning of a hall, the use of visual alarm devices and the plant noise-control policy are site matters that should be agreed with the safety officer before the speaker schedule is fixed.
Paging equipment in a plant is exposed equipment. Published ratings are IP66 for the A233 horn and the A513W video speaker, IP66 and IK10 from −40 °C to 70 °C for the A12V, IP65 and IK10 from −30 °C to 60 °C for the i16S/i16SV, −30 °C to 60 °C on the PA2S gateway and −20 °C to 50 °C on the PA3. On the power side, PA2S is PoE to IEEE 802.3af, PA3 is PoE/PoE+ (IEEE 802.3at, published as PoE Class 4) with 12–24 V 2 A DC as the alternative, A212 is published as PoE 8 W / PoE+ 15 W and A201 takes PoE, PoE+ or DC. Cable classes, containment, separation from power and earthing are local industrial wiring rules — confirm them before first fix.
The W712 puts UHF 400–470 MHz radios onto the telephone system, and radio spectrum use, power limits and licence conditions are regulated nationally: the plant own radio licence and its conditions apply to whatever the gateway is connected to. Recording is the second question, because audio archiving of SIP paging, intercom and calls and radio call recording on the W712 both capture workplace speech. What may be recorded, how long it is kept and what the workforce is told are local determinations. Confirm the radio licence position and the recording policy with the plant own compliance owner before the gateway is installed.
We have not published a named reference project on this page. The site does not carry customer names or installation records until the client confirms in writing which projects may be made public.
Page author: NEXVIA EngineeringPublished:Last updated:
Covers: industrial paging system · factory pa system · industrial public address system · paging system for factory · warehouse pa system
All IP telephony, intercom and paging equipment in this design is supplied and integrated by NEXVIA.
Running an existing platform
Replacing an older system
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Send us the site type, the number of extensions or rooms and the areas to cover — we will come back with a configuration and quotation.
Six facts build a configuration: site type, extensions or rooms, simultaneous calls, areas to cover, existing lines and the documents you already hold. Send as many as you know — nothing has to be final before the first reply.
