Reference configuration · Campus PA and emergency broadcast

Campus public address — reference configuration

Q: How many zones can the system handle?

The speaker models in this range state up to 20 multicast zones with prioritisation, and this design uses 14 of them across three buildings and the grounds. How zones are grouped, and which zone wins when two pages overlap, is configured in the platform — confirm your priority order for evacuation on the quotation.

A campus broadcast design built on the three tiers the public-address material prints: 70 SIP speakers across 14 zones, two gateways that bring the existing analog horn lines onto the network, ten emergency intercom points, and dispatch consoles that hold the platform themselves at the Lite tier.

Zones: 14 across three buildings and the outdoor areas
Speakers: 70 — A201 and FH-S01 ceiling, A212 wall, A233 horns outdoors
Legacy lines: two PA3 gateways bring existing analog speaker runs onto the network
Emergency points: ten — six A12V outdoors and four i16SV indoors
Dispatch: one A330i in the control room, two A308i in the guard room and duty office
Up to 20 multicast zones with prioritisation is the stated capability of the speaker models

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Three-tier IP public address and intercom architecture diagram

This is a reference design prepared from the product datasheets, not a record of a named customer installation.

Design parameters — what should you know?

Buildings and areas: Three buildings plus outdoor areas
Zones: 14
SIP speakers: 70 across four models
Emergency intercom points: 10 — six outdoor, four indoor
Dispatch consoles: 3 — one A330i and two A308i
Analog lines bridged: 2 × PA3 gateways, two SIP lines each

Equipment list for this design — what should you know?

Item	Model	Qty	Note
Dispatch console, control room	A330i	1	Android 14 console with a 10.1-inch touch screen, 116 DSS keys, 92 dB speaker, 8 short-circuit inputs, 1 output and an RS-485 port; built-in broadcast system
Dispatch console, guard room and duty office	A308i	2	7-inch touch console, 20 SIP lines, 116 DSS keys, 90 dB speaker, PoE
SIP ceiling speaker, teaching buildings	A201	36	Classroom and corridor coverage; built-in microphone for self-test, monitoring and two-way voice; up to 20 multicast zones
SIP wall speaker, corridors	A212	18	Wall positions where the sound has to be aimed; up to 15 W class D output, PoE 8 W or PoE+ 15 W, talkback
SIP ceiling speaker, hall and canteen	FH-S01	8	Up to 20 W class D output, PoE IEEE 802.3af; a customisable WAV file for emergency notification and alarm linkage
SIP horn speaker, outdoors	A233	8	30 W rated output, IP66 for the sports field, gate and outdoor walkways; built-in microphone for self-test and two-way voice
Paging gateway for legacy lines	PA3	2	Bridges existing analog speaker runs onto the network; two SIP lines each; 10–30 W output into 4 Ω/30 W or 8 Ω/15 W; PoE Class 4 or 12–24 V DC; SOS call key
Intercom gateway at outdoor help points	PA2S	4	One short-circuit input and one output, one relay, camera support through an external accessory up to 1080p; PoE IEEE 802.3af or 12–24 V DC
Outdoor emergency intercom	A12V	6	IP66 and IK10, 10 W speaker with AEC, camera with infrared night vision, 2 short-circuit inputs and 2 outputs, −40 °C to 70 °C
Indoor emergency intercom	i16SV	4	IP65 and IK10, 3 W speaker with AEC, camera with infrared night vision, 2 short-circuit inputs and 2 outputs, −30 °C to 60 °C
Radio-over-IP gateway (optional)	W712	1	Links one analog or DMR II radio and one SIP call into the system, with group calls between radios and SIP phones; UHF 400–470 MHz; USB and TF storage up to 128 GB
PoE access switch	Customer network hardware	8	Twenty-four-port PoE units for the speakers, intercom points and gateways, PoE+ where a zone has to hit full output on the A212; one per building area plus the outdoor run

Three tiers, and which one this design stands on — what should you know?

The public-address material prints three tiers, and they differ in where the platform lives rather than in the endpoints.

This campus design is built on the Lite and IP endpoint tiers: the dispatch consoles hold the platform, and every zone device is an endpoint
Terminals can be scanned and provisioned automatically by the A330i, A320i and A308i consoles
The Advanced tier is the upgrade path when the site needs multi-site management, text-to-speech and scheduled broadcast templates

The three printed tiers

Tier	Platform	Stated character
Advanced PA and intercom	Cloud or on-premise B/S server, multi-site	Large deployments: dynamic zone control, remote volume adjustment, real-time text-to-speech, digital map, audio archiving, app control and alerts
Lite PA and intercom	The console itself — no dedicated server	SMB and campus: auto terminal provisioning, plug-and-play, SIP hotspot, zone and media management from a 10.1-inch screen
IP endpoint	Any standard SIP platform	SIP-compatible endpoints that bridge legacy analog cabling, with short-circuit linkage, PoE and ONVIF

This is a reference design prepared from the product datasheets, not a record of a named customer installation.

Zones, priority and the emergency path — what should you know?

The speaker models in this range all state support for up to 20 multicast zones with prioritisation, which is the ceiling this design works inside: fourteen zones across three buildings and the grounds.

The deck states one-click emergency broadcast and zoned paging as core functions of the system
Emergency intercom points carry short-circuit inputs, so an alarm button can trigger the call and a strobe at the same time
A212 and FH-S01 take a customisable WAV file for emergency notification, and A212 alarms can be linked to security devices
ONVIF is stated for the intercom and broadcast terminals, so events can be tied to a VMS and, in the Advanced tier, to AI camera rules that trigger pre-recorded broadcasts

Zone and speaker schedule

Area	Zones	Speaker	Qty
Teaching building A	4	A201 ceiling — classrooms and corridors	24
Teaching building B	2	A201 ceiling — classrooms and corridors	12
Teaching buildings A and B	3	A212 wall — corridor runs	18
Hall and canteen	2	FH-S01 ceiling	8
Sports field and gate	2	A233 horn — IP66, 30 W	6
Outdoor walkways and gate	1	A233 horn — IP66, 30 W	2

Priority behaviour between zones is configured in the platform; confirm the priority table for your own evacuation plan on the quotation.

Bridging what is already on the wall — what should you know?

The IP endpoint tier is explicitly built to connect legacy paging systems to an IP environment, as a full IP or hybrid solution
A PA3 gateway takes the page from the network and drives the existing passive speakers or an amplifier through its line output
The PA2S adds a relay and short-circuit contacts, which is what an outdoor help point needs for a gate or a light
PA3 also takes an SOS call key, a line input and a USB or TF card for offline audio playback
Where a camera has to see the help point, the PA2S supports an external camera through an accessory, up to 1080p
A330i and A320i consoles scan and add the terminals automatically, so existing runs are re-labelled rather than re-cabled

The materials do not name a server model for the Advanced tier; the cloud or on-premise platform is confirmed on the quotation.

Frequently asked questions

Can the campus keep its existing horn speakers?

Yes. The PA3 and PA2S gateways are the bridge in this range: the page arrives over SIP and leaves through the gateway line output for the analog speaker line. The material frames this as making it possible to create a full IP or hybrid solution, so the existing runs can be reused rather than replaced.

How many zones can the system handle?

The speaker models in this range state up to 20 multicast zones with prioritisation, and this design uses 14 of them across three buildings and the grounds. How zones are grouped, and which zone wins when two pages overlap, is configured in the platform — confirm your priority order for evacuation on the quotation.

Does this design need a server?

At the Lite tier, no. The console itself carries the built-in management platform, and the terminals are discovered and provisioned automatically by the A330i, A320i and A308i consoles. The Advanced tier adds a cloud or on-premise B/S server for multi-site management, dynamic zones and text-to-speech, but the material does not name a server model, so the platform is specified on the quotation.

Does it tie into the CCTV system?

The intercom and broadcast terminals are stated as ONVIF-compatible, which is how they are linked to a VMS. The PA2S supports an external camera accessory up to 1080p, and in the Advanced tier the platform can trigger pre-recorded broadcasts from AI camera events such as intrusion. Exact camera models are confirmed against your VMS on the quotation.

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Page author: NEXVIA EngineeringPublished: 2026-09-29Last updated: 2026-10-13