Syncline Setup Guide

Last updated: October 2, 2026

Syncline logs every Aircall call — answered, missed, or voicemail — into your HighLevel account as a native call record with status, duration, and recording. Setup is guided. Start with this illustrated product overview, then follow the setup steps below.

Illustrated overview · on-screen text, no audio · October 2026. The current setup instructions follow.

Before you begin

  • An active Aircall account with at least one phone number.
  • A HighLevel account — a single account or an agency managing multiple accounts — where you can install marketplace apps.
  • A payment method on the account that will hold the subscription — HighLevel asks for it at install, but nothing is charged during the 14-day free trial.

Step 1 — Install Syncline from the HighLevel App Marketplace

  • Open the App Marketplace in HighLevel and search for Syncline, or use the install link from your welcome email.
  • Click Install and select the account(s) you want Syncline on. Agencies can select multiple client accounts in one pass.
  • Review the five permissions Syncline requests and click Allow & Install:
    • View conversations — so records land in the right conversation thread.
    • Send messages (call records) — this is how call records are written.
    • View contacts — to find the right contact by phone number.
    • Create & update contacts — so unknown callers get a contact automatically.
    • View locations — so the setup wizard can show your accounts by name when you map numbers.
  • Choose your plan (Solo, Grow, or Agency). Every plan starts with a 14-day free trial.

Step 2 — Connect your Aircall account

Right after install, click Finish setup → Connect Aircall on the confirmation page (the same link is in your welcome email), then click Connect with Aircall. You'll sign in to Aircall, approve Syncline on the consent screen, and land right back in the wizard — no API keys, nothing to copy or paste. Syncline stores the connection encrypted and creates the call webhook in your Aircall account automatically. There is nothing to configure inside Aircall.

If Aircall's number-selection or approval screen loops instead of returning you to Syncline, contact [email protected] with the step where it stopped. We'll help check the connection before you change your existing integration.

Prefer not to touch any of it? White-glove setup is still free on every plan — email [email protected]and we'll do the whole thing for you.

Step 3 — Map your numbers

The wizard pulls your phone numbers straight from Aircall and shows your HighLevel accounts by name — no cryptic IDs. What you see depends on your setup:

  • One account?One click. The wizard says exactly what will happen — "every number below will log its calls to Your Account Name" — and a single Map all numbers button does it. Want a number left out or pointed elsewhere later? Customize per number is right next to it.
  • Multiple accounts?Each number gets a dropdown of your account names. Pick where each one logs, or choose "don't map this number" to leave a line out.
  • Nothing is saved until you click Save. Every number shows its live status — not mapped yet before saving, a ✓ mappedcheck after — so the screen always tells you what's actually active.

Adding a number later? Reopen your setup link and map it the same way. If a call ever arrives on an unmapped number, Syncline records it and flags it loudly — no call is ever silently dropped.

Step 4 — Verify it's working

  • The wizard's final step watches for your test call live — place a quick call to (or from) one of your mapped Aircall numbers and the page turns green when the record posts.
  • Open the contact in HighLevel — within seconds you'll see a native call entry ("Call completed" or "No answer") in the conversation timeline, with duration and the recording attached once Aircall finishes processing it.
  • If the caller was unknown, you'll find a freshly created contact with their phone number.

Using it with workflows

After Syncline logs a call it tags the contact with the outcome, and you build your automation on HighLevel's Contact Tag trigger. The tags:

  • syncline-missed-call — no answer
  • syncline-voicemail — caller left a voicemail
  • syncline-answered-call — call connected
  • syncline-inbound-call / syncline-outbound-call — direction, applied alongside the outcome

To build a missed-call text-back: Automation → Create workflow → trigger Contact Tag → filter Tag added → syncline-missed-call → add your Send SMS action → Publish. Same pattern for a follow-up task on syncline-voicemail or a pipeline update on syncline-answered-call.

SMS uses your HighLevel messaging service.Syncline supplies the outcome tag; it does not send Aircall SMS/MMS. Your messaging service's setup, charges, and sending requirements still apply.

Syncline removes the tag about a minute after applying it, so the nextcall on that contact fires your workflow again. Nothing to maintain — and you can turn tagging off in the setup wizard if you'd rather not use it.

Why tags and not the Call Status trigger? HighLevel's built-in Call Status / Call Detailstrigger only fires for calls placed through HighLevel's own phone system — its marketplace documentation confirms that logged calls from third-party phone systems don't start workflows. Tags are how HighLevel exposes automation to apps like ours, and they're just as immediate.

Switching from another Aircall integration

  • Confirm that call logging and outcome tags cover what you need. Syncline does not support Aircall SMS/MMS, transcripts, or AI summaries.
  • Install Syncline, map your numbers, and verify a test call and its workflow. Watch for duplicate records or follow-up actions during any overlap.
  • Choose one logger for normal use and update your workflow triggers before retiring the old integration. Keep any additional features you need covered. Existing records stay in HighLevel.

Follow the step-by-step Airlinx switch guide, or contact us for setup help.

Troubleshooting

  • A call didn't log: reopen your setup link and check the number is mapped — unmapped numbers are held and flagged, never dropped. Remap it yourself, or email us and we'll replay it.
  • Records log but workflows don't fire: confirm your workflow trigger is Contact Tag → Tag added (e.g. syncline-missed-call) and the workflow is published in the same account.
  • Anything else: see the Syncline support page, or reach us at [email protected] / +1 (877) 729-1560. We answer fast.

Disconnecting Aircall or uninstalling

Need to swap Aircall accounts or stop logging? Open your setup link and click Disconnect Aircall — Syncline removes its webhook from your Aircall account, revokes the stored connection, and clears your number mapping in one step. Reconnect any time by running the wizard again.

To remove Syncline entirely, uninstall it from a account via the App Marketplace. Call logging for that location stops immediately, and you can ask us to delete stored data whenever you like — see our Privacy Policy.