Comparison · Paging, intercom and bell hardware

Multilarm vs Valcom: an honest comparison

Long-established paging, intercom, clock and bell hardware, in both analogue and IP forms.

Checked against published documentation on 2026-08-30

Valcom is the right choice for a site that wants proven, installed paging hardware — including synchronised clocks and bells — from a manufacturer whose products are already in thousands of similar buildings. Multilarm is the right choice for a site that wants the scheduling and announcement intelligence to be software it can change itself.

This page is written by the makers of one of the two products, so the only version worth publishing is one that is specific about where the other one wins. Every section below names a buyer who should not choose Multilarm.

What Valcom is

Valcom makes the physical layer of building communication: paging speakers, horns, amplifiers, intercom stations, synchronised clocks and bell controllers, in both traditional analogue and IP-networked forms.

Its strength is longevity and breadth. Much of what it sells is designed to be installed once and left for fifteen years, and it interoperates with phone systems as a matter of course.

Where Valcom is better

Synchronised clocks. A building where every clock agrees with the bell is a Valcom speciality and is not something software can do without hardware.
Phone system integration as a first-class feature, tested against the systems buildings actually run. Multilarm's SIP add-on has never been tested against a real PBX.
Hardware breadth for difficult spaces — horns, weatherproof units, explosion-hazard areas.
Installed base and installer familiarity. The person who maintains your building probably already knows it.
Analogue paths that do not depend on a network at all, which for some buyers is the whole point.

Where Multilarm is better

Changing the schedule. Term dates, exam fortnights and one-off changes are rules typed into a form, not a controller reprogrammed on site.
Typed announcements. Offline neural speech means a new announcement takes a minute and nobody has to record it.
A record of what happened. An audit ledger of what played and what was triggered, which hardware bell controllers generally do not keep.
Cost. One small computer and a perpetual licence.
Openness — REST, MQTT, webhooks, CLI — so the building's audio can be driven by anything else on site.

Side by side

Cells reading “Not published” mean we could not find the answer in Valcom’s own documentation on 2026-08-30. That is not the same as “no”, and this table will not pretend it is.

Capability	Valcom	Multilarm
Synchronised building clocks	Yes	No — not a hardware product
Phone system paging	Yes, long established	A separately licensed SIP add-on, never tested against a real PBX
Speaker supervision	Available on supervised product lines	No — planned
Complex, self-reverting schedules	Not published in this form	Yes
Typed announcements (text to speech)	Not published	Yes — English only
Audit record of what played	Not published	Yes
Works with no network at all	Yes, on analogue lines	No — it is software on a computer, though it needs no internet
Licence shape	Hardware purchase, quoted	One-off perpetual; free for personal non-commercial use

Choose Valcom if

You need synchronised clocks as well as bells.
Paging from the phone system is a firm requirement and must be known to work.
The environment is harsh, outdoors or hazardous and needs purpose-built hardware.
Site policy says the bell system must not be a computer.

Choose Multilarm if

The schedule changes often enough that reprogramming a controller is a recurring annoyance.
Announcements should be typed rather than recorded.
Somebody will eventually ask for a record of what played.
The existing amplifier and speakers are fine and only the brain needs replacing.

How to check any of this

Multilarm’s own capabilities are published as machine-readable data at features.json, including every feature it does not have and the ones it has deliberately declined to build. Measured performance figures, with the method for each, are on the measured data page. The canonical facts about licensing, offline operation and the fire-alarm boundary are at facts.json. If anything on this page is wrong, say so and it will be corrected.

FAQ

Can Multilarm drive an existing Valcom amplifier?

If the amplifier has a line input, yes — that is the normal way Multilarm is installed. It is the source, not the amplification.

Does Multilarm do synchronised clocks?

No. It is software; clocks are hardware.

Sources

Everything stated here about another product is taken from that vendor's own public documentation on the date shown, and is limited to what they publish about themselves. Products change; if something below is out of date or wrong, tell us and it will be corrected. Where we could not find a published answer the table says so rather than guessing.

Valcom product range

Not sure this is the right purchase for your building? Ask a specific question — including whether you should be buying something else.