UCaaS · Call flow builder

Build call flows on a canvas — no code, no waiting

Most phone systems make you file a ticket to change how calls route. intSignal gives you a visual builder instead: drag blocks onto a canvas, connect them, and your call flow is live. IVR menus, ring groups, queues, business hours, conditions, AI agents and SMS actions are all blocks — assemble them like a flowchart, test with a simulated call, and publish in one click.

Live, interactive demo — click to explore it.
Drag-and-drop canvasIVR, queues, hours & AI as blocksConditions & branchingSimulated test callsVersion history & rollbackPlain-English AI build
Call flow builder · Main line✓ Draft saved
Blocks — tap to add
Incoming call
Greeting
IVR menu
+ drop a block

The canvas

Every routing decision, visible at a glance

See the whole caller journey as a diagram instead of a maze of settings buried in menus. Drag a block, draw a connection, and the path is defined. Because it's visual, anyone on your team can understand — and safely change — how calls flow.

Branch on real conditions: business hours and holidays, caller ID and area code, VIP or CRM status, language, wait time, or the outcome of an AI agent. No scripting required.

✓Blocks for everythingIVR menus, ring groups, queues, voicemail, hours, conditions, AI agents, SMS.
✓Conditional branchingRoute on hours, caller ID, CRM data, language, and queue state.
✓Reusable sub-flowsBuild a menu once and drop it into many flows.
✓Templates to start fastProven layouts for sales, support, and after-hours.
Conditions & branching
Caller reaches menu
Condition · VIP customer?
Yes → priority queueNo → standard queue
logicRoute on hours, caller ID, CRM data, language, wait time and more.

Confidence before you publish

Test the exact path before a real caller does

Run a simulated call through any flow and watch each step light up — greeting played, menu choice, queue reached, agent answered. The builder flags dead ends and unreachable branches before they ever hit a customer.

✓Dry-run any callerSimulate a time of day, caller ID, or menu choice.
✓Dead-end detectionThe builder warns on paths that trap or drop callers.
✓Live path traceWatch the route resolve step by step in real time.
✓Preview greetingsHear AI-generated or uploaded audio in context.
Test call · dry run
10:02Incoming → Greeting played
10:02IVR: caller said “support” → Support queue
ResultAnswered by Sam C. in 8s. Path valid — no dead ends.
verifySimulate any caller and see the exact path before it goes live.

Ship safely

Publish in one click — roll back in one more

Every change is versioned. Publish when you're ready, and if something's off, restore the previous version instantly — no downtime, no re-building. See who changed what and when, so routing changes are auditable.

✓One-click publishChanges go live the moment you're ready.
✓Instant rollbackRestore any previous version in seconds.
✓Change historyWho changed what, when — a full audit trail.
✓Sandbox draftsWork on next week's flow without touching today's.
Versions & safe publish
v14 · LivePublished by Priya · todayLive
v13Holiday routing · Dec 20Restore
v12Added AI agent block · Nov 8Restore
shipTest in a sandbox, publish with one click, roll back instantly.

AI-assisted

Or just describe it, and let AI build the flow

Type “ring sales 9–5, send after-hours to voicemail, and text me when a VIP calls,” and the AI assembles the blocks for you on the canvas — ready to review, tweak, and publish. It's the fastest way to stand up a new flow or reshape an old one.

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Plain-English to flow

Describe the outcome; AI lays out the blocks.

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AI agent blocks

Drop a conversational AI agent into any branch.

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Smart suggestions

The builder recommends fixes and better routing.

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Editable, always

AI drafts a starting point — you stay in control.

See the builder handle your call flow

Bring your trickiest routing — hours, overflow, VIP handling, after-hours — and we'll build it live on the canvas.

Book a walkthrough  ⟶

Frequently asked questions

What is a visual call flow builder?

It's a drag-and-drop canvas for designing how inbound calls are handled. Instead of editing scattered settings, you place blocks — IVR menus, ring groups, queues, business hours, conditions, AI agents — and connect them into a flowchart. What you see is exactly how calls route, and you can change it yourself without a ticket or a developer.

Do I need technical skills to change call routing?

No. The builder is designed for admins and team leads, not developers. Drag a block, draw a connection, and publish. For anything you'd rather not build by hand, describe it in plain English and the AI assembles the flow for you to review.

Can I test a call flow before it goes live?

Yes. Run a simulated call through any flow — set the time of day, caller ID or menu choice — and watch each step resolve. The builder flags dead ends and unreachable branches before a real caller ever hits them.

What happens if I make a mistake?

Every change is versioned. Publishing is one click, and rolling back to a previous version is one more — instantly, with no downtime. A full change history shows who changed what and when.

What can I route on?

Business hours and holidays, caller ID and area code, VIP or CRM status, language preference, queue wait time, and the outcome of an AI agent — combined with conditional branching to send each caller exactly where they should go.