What "Audio over IP" actually means
In a traditional PA system, audio travels as an analogue signal from a microphone or source through a central amplifier, then out over 100-volt speaker lines to every speaker. In an IP paging system, the audio is converted to digital packets at the source and sent over the same network that carries your computers, printers and phones. Each endpoint decodes the packets and plays the audio locally.
The practical consequences are significant. Any endpoint can be addressed individually or in any group you define, announcements can originate from any authorised phone, console or software client, and the system grows building by building rather than amplifier by amplifier.
Power over Ethernet (PoE) endpoints
Most modern IP speakers and intercoms are powered by the network cable itself, using Power over Ethernet. This means one cable per endpoint carries both audio and power, which usually removes the need for an electrician to wire a 240V point at every speaker location.
The trade-off is that your network switches must supply enough PoE power for every connected endpoint. A modest school deployment can easily need a dedicated PoE switch, or switch upgrades, which is one of the main cost drivers in an IP project. Our network readiness checklist covers what to check before specifying an IP system.
Zoning, scheduling and per-endpoint control
- Zones are software-defined. A "zone" can be one classroom, one building, or the whole site, and can be changed without re-cabling.
- Calendars and schedules. Bell schedules, period changes and pre-recorded messages can follow timetables, including public holidays and term breaks.
- Per-endpoint volume and prioritisation. A hall can run quieter than a workshop, and emergency messages can preempt routine paging automatically.
- Remote management. Endpoint health, firmware and configuration are monitored from a web interface rather than a site visit.
For schools, these capabilities map directly onto bell and announcement requirements - see our school bells and announcements guide.
Emergency and lockdown capability
Because messages are digital, IP platforms can store pre-recorded emergency announcements, trigger them from multiple points, and target specific zones. Many platforms integrate with existing security systems or provide dedicated lockdown buttons. Planning guidance is in our emergency and lockdown communication guide.
Two-way communication and intercom
IP intercom endpoints add two-way audio, so classrooms or gates can talk back to the office. Many schools use a mix of one-way speakers and two-way intercom units. See the IP intercom guide for how two-way paging works and what it adds to a deployment.
IP vs traditional vs hybrid
A full IP system gives the most flexibility but assumes a capable network. A traditional 100V system is simple and cheap for basic paging but limited. A hybrid keeps working 100V speakers and cabling while replacing the control layer with IP - often the most cost-effective path for staged upgrades. The architecture comparison covers the trade-offs, and what to keep when replacing an old PA deals specifically with reuse.
Published NZ evidence
What published NZ paging projects show
There is no single correct architecture for every site. These published examples show direct network paging, network control feeding amplifier zones, and a conventional warehouse paging design where coverage and acoustics mattered more than forcing every endpoint onto IP.
Richmond Road Primary - IP paging over the school network
Edwards describes a school-wide IP paging project using the existing LAN/Wi-Fi environment, software zoning and VoIP integration so announcements can be made without a separate school-wide audio-cabling architecture.
Published NZ installer account · April 2024; the cited 2N audio family is historical for new-build comparison purposes.
View source: Edwards Sound Systems (opens in a new tab)Ormiston Junior College - network bells, paging and lockdown controls
Pacific AV describes a FrontRow network paging and bell design using server-managed zones, network decoders feeding amplifier channels, scheduled audio and lockdown controls. Australasian Audio Engineering is named as the dealer.
Published NZ distributor account · August 2017; useful architecture example, not a current product-availability claim.
View source: Pacific AV (opens in a new tab)Sanitarium Auckland - two-zone warehouse paging
Audio Connect describes a warehouse PA project combining background music and paging across the main warehouse and a truck-driver area. It is a useful reminder that the right paging architecture depends on the site rather than IP being mandatory everywhere.
Published NZ installer account · September 2026.
View source: Audio Connect (opens in a new tab)What IP paging tends to cost
Endpoint count, indoor/outdoor mix, cabling state and network readiness are the main cost drivers. Indicative NZ installed ranges and a calculator for your own site are on the pricing page.
Choosing a platform
SmartComms compares integrated school platforms, SIP-first options, browser-managed network audio, hybrid approaches and specialist architectures from brands including SPON, FrontRow, Algo, Bosch, ITC, Axis, TOA and others relevant to the NZ market. Our platform comparison guide matches those options to your priorities for NZ buyers. Planning for a rest home or retirement village? Use the aged-care comparison, where the requirements and shortlist differ. For warehouse announcements, shift bells and noisy work areas, see the warehouse and industrial comparison.
Common questions
IP paging and PA FAQs
What is an IP paging system?
An IP paging system sends live or prerecorded audio over the data network to network speakers, intercoms, gateways or other endpoints. Zones and schedules are usually software-defined rather than fixed by one amplifier circuit.
Does IP paging require a VoIP phone system?
No. Some systems use SIP phones or a PBX for convenient paging, but scheduling and multicast paging can also operate without a phone system on suitable platforms. Confirm the exact control workflow in the proposed design.
Can IP paging use existing 100V speakers?
Often, yes. A gateway or network audio bridge can feed a compatible amplifier so useful existing speaker circuits are retained. The trade-off is that speakers sharing one analogue circuit cannot gain individual endpoint control without changing the downstream architecture.
Is full IP always better than a hybrid system?
No. Full IP provides flexible endpoint control, but a hybrid can be the better-value answer when existing speakers, amplifiers or cabling are in good condition and still suit the required zones.
Next steps
- Check your network against the network readiness checklist
- Write your scope with the specification checklist
- Get an indicative cost with the Pricing Tool
- For a school project, check potential funding; other organisations can also explore finance or leasing
Continue planning your project
Compare paging platforms
Use-case shortlists for integrated school platforms, SIP-first paging, hybrid migration and specialist architectures.
Network readiness checklist
Check cabling, PoE and switch capacity before requesting IP paging quotes.
Replacing an old PA system
What can be kept, what usually changes and how to plan the replacement.
Last reviewed 23 September 2026. General information only - not design or compliance advice for any specific site.