Slack Phone Integration — Calls, SMS & WhatsApp

Connect your phone system to every tool in your stack - without writing a line of code.

Connect PBX.IM to Slack and automate calls, SMS, and WhatsApp across your entire workflow. Trigger calls when a deal moves, send SMS when a form is submitted, log every interaction where it belongs - all through Slack phone system.

Slack
Companies that trust PBX.IM

How PBX.IM Phone Integration Works with Slack?

The Slack phone system integration that connects PBX.IM to every tool in your stack - so calls, SMS, and WhatsApp fit into your workflows instead of sitting outside them.

Click-to-Call from Slack

Trigger a call to any contact directly through Slack - no copy-pasting numbers, no switching apps. One action in your workflow starts the call through PBX.IM. 

Automated SMS via Slack

Send SMS automatically when a trigger fires in Slack. New lead, form submission, payment confirmed, ticket opened - any event can kick off a text message through PBX.IM without any manual action.

WhatsApp Messaging via Slack

Add WhatsApp to any workflow in Slack. Send automated messages, follow-ups, or notifications to contacts on WhatsApp - and log every reply back to the right record automatically.

Call Monitoring Across Workflows

Track call activity and performance across every workflow connected to Slack. Supervisors get full visibility into what's happening on every call - and the data flows wherever your stack needs it. 

Call Data Logged Across Your Stack

Every call made or received through PBX.IM can trigger an action in Slack - update a CRM record, create a task, send a notification, or move a deal to the next stage. No manual logging, no gaps in your data. 

Slack Phone System Use Cases

Built for teams that run on connected workflows. PBX.IM adds calls, SMS, and WhatsApp to any automation without extra tools or extra steps.

Feature card background

Trigger Calls from Any Workflow

When a lead reaches a certain score, a deal moves to a new stage, or a form is submitted - PBX.IM fires a call automatically through Slack. No manual handoff, no missed follow-up.

Feature card background

WhatsApp in Any Automation

Add WhatsApp to workflows that previously only had email or SMS. Reach contacts on the channel they respond to fastest - and log every reply back to the right record through Slack.

Feature card background

SMS Notifications and Follow-Ups

Send automated SMS messages at any point in your workflow. Appointment reminders, payment confirmations, delivery updates - any trigger in Slack can kick off a text through PBX.IM instantly.

Feature card background

Call Logging Across Every Tool

Every PBX.IM call can write data back through Slack to any connected platform - CRM, helpdesk, project management, or spreadsheet. One call, automatically logged everywhere it needs to be.

Feature card background

Alerts and Escalations

When a call is missed, goes unanswered, or exceeds a set duration - trigger an alert, create a task, or escalate to a manager automatically through Slack. Nothing falls through without someone knowing.

Feature card background

Multi-Step Communication Workflows

Build sequences that combine calls, SMS, and WhatsApp across multiple tools - all orchestrated through Slack. No switching platforms, no manual steps between touchpoints.

Keep Your Tools. Upgrade Your Workflow.

PBX.IM connects with the platforms your team already relies on - so you can add powerful calling without replacing anything.

See All Integrations
stats-background
Don’t See Your Tool Listed?

PBX.IM connects with Slack and any other platform your team uses. If you don’t see your tool in the list, contact us and we’ll set it up for you.

Contact Us

Slack Phone System FAQs

Does Slack have a telephony system?

Slack does not include a native phone system. To make and receive calls, send SMS, and manage WhatsApp directly from Slack, you need to connect it to a business phone system like PBX.IM.

Does Slack have a VoIP?

Slack does not have built-in VoIP. By connecting PBX.IM to Slack, your team gets full VoIP calling, SMS, and WhatsApp without leaving the platform they already work in.

Can you make phone calls through Slack?

Yes - once you connect PBX.IM to Slack, you can make and receive calls directly from any contact record using Click-to-Call. No switching apps, no manual dialing.

How to integrate telephony with Slack?

Connect PBX.IM to Slack through the PBX.IM integrations dashboard:

  1. Sign in to PBX.IM and open Integrations.
  2. Find Slack in the list and click Connect.
  3. Sign in to your Slack account and authorize access.
  4. Choose which seats to enable and what to sync — calls, texts, messages, and contacts.
  5. Save, and you're live.

Once connected, your team can call, text, and message contacts directly from Slack, with all activity synced automatically.

Does PBX.IM log calls automatically to Slack?

Yes. Every inbound and outbound call is logged to the relevant contact record in Slack automatically, including duration, outcome, and any notes added during the call. Each call also generates an AI transcript with a summary and action items, so your team has the full picture of every conversation without listening back to recordings.

Can I send SMS from Slack using PBX.IM?

Yes. Once PBX.IM is connected, you can send and receive SMS messages directly from Slack. All message threads are stored against the contact record and visible to your whole team.

Does the integration support WhatsApp?

Yes. PBX.IM includes WhatsApp Business messaging, which means your team can send and receive WhatsApp messages from within Slack. Every conversation is logged to the contact record automatically.