How to Connect VoIP Phone Systems to GoHighLevel: Complete 2026 Guide

Last updated: September 2026

Business phone systems used to live in a completely separate world from the CRM.

A customer would call through RingCentral, TELUS Business Connect, 8x8, Dialpad, Ooma, Bell, Rogers or another VoIP provider. A salesperson might then manually add notes to the CRM, send a separate email, update a pipeline and hope someone remembered the follow-up.

That separation creates a simple problem: the conversation happens in one system while the customer relationship lives somewhere else.

GoHighLevel changes that model by bringing calling, CRM activity, SMS, workflows, calendars, Voice AI and — for supported configurations — physical SIP deskphones into a more connected environment.

This guide explains what each approach means, what can and cannot be integrated, and how to choose the right setup for your business.

What Is GoHighLevel VoIP Integration?

A GoHighLevel VoIP integration connects some or all of your business calling environment with HighLevel.

Depending on the setup, this can allow your business to:

• Make outbound calls from the CRM
• Receive incoming business calls
• Route calls between users or departments
• Use compatible physical VoIP deskphones
• Record and transcribe calls
• Route calls through an IVR
• Use Voice AI as a primary or backup call handler
• Trigger workflows after a call
• Send automated SMS or email follow-ups
• Track conversations against the customer record
• Book appointments
• Keep an existing business number during migration
• Port an existing number into HighLevel

The most useful question is therefore not simply, “Can my VoIP provider connect to GoHighLevel?”

A better question is: “Which parts of my current phone system do I want HighLevel to manage?”

How the HighLevel Phone System Works

HighLevel’s native phone environment is commonly referred to as LC Phone. Some agencies also operate locations connected to their own Twilio environment.

HighLevel now supports physical VoIP deskphones as SIP endpoints. Its current documentation states that compatible deskphones can be connected directly to HighLevel for inbound and outbound calling, with features such as call recording, call transfers and call transcription continuing to work with the CRM. See HighLevel’s deskphone documentation.

That makes several architectures possible.

There is no single architecture that is best for every company.

The 4 Main Ways to Connect VoIP With GoHighLevel

1. Forward Your Existing VoIP Number to HighLevel

This is usually the simplest way to start.

Suppose your business already has a number that customers know and your current provider is RingCentral, TELUS Business Connect, 8x8, Dialpad, Ooma, Bell, Rogers, VoIP.ms or another carrier.

Instead of changing that number immediately, you can configure the existing provider to forward inbound calls to a HighLevel-managed number. The customer still calls your normal business number.

This approach is particularly useful when:

• You are not ready to replace your existing provider
• You want to test HighLevel Voice AI
• You want AI to answer after-hours calls
• You want an overflow or missed-call destination
• You want a gradual migration
• You do not want to disrupt a number customers already know

A practical example is a medical or dental clinic that keeps its current business phone system during office hours but forwards unanswered or after-hours calls to a HighLevel Voice AI agent.

2. Use Your Existing Business Number for Outbound HighLevel Calls

In July 2026, HighLevel documented support for placing outbound voice calls using a phone number the business already owns. See HighLevel’s existing-number calling guide.

A sales team may be able to make calls from HighLevel while displaying a verified existing business number, even before purchasing or porting a dedicated HighLevel number.

HighLevel’s existing-number calling feature is therefore best viewed as an outbound calling option, not a complete carrier migration.

3. Keep Voice With Your Existing Provider but Move SMS/MMS Into HighLevel

HighLevel’s Number Hosting feature creates another useful hybrid option.

For eligible numbers, the business can keep voice service with the existing carrier while routing SMS/MMS through HighLevel.

HighLevel’s current Number Hosting guidelines state that most eligible U.S. and Canadian landline and toll-free numbers can potentially be used for hosted messaging, subject to eligibility and verification requirements. See Number Hosting guidelines.

Important limitations apply. Mobile numbers are not eligible for this hosted-messaging model, and the number generally cannot already have SMS enabled with another provider in a conflicting configuration.

4. Port Your Business Number Completely Into HighLevel

If your goal is to make HighLevel the primary phone environment, porting may be the cleanest long-term approach.

Porting transfers the number from the old carrier to the new phone environment.

HighLevel supports porting eligible non-Twilio numbers into a HighLevel location, but the exact process depends on the number, country, carrier and destination phone environment. See HighLevel’s porting guide.

Can You Connect a Physical VoIP Deskphone Directly to GoHighLevel?

Yes.

HighLevel supports compatible open-SIP VoIP deskphones as direct SIP endpoints. Its current recommended-device examples include:

• Yealink T54W / T58W
• Poly VVX 450
• Grandstream GXP2170
• Snom D785
• Cisco 7841

HighLevel also recommends avoiding carrier-locked or proprietary-provisioning devices.

How to Connect a SIP Deskphone to HighLevel

1. Open the correct HighLevel sub-account.
2. Navigate to the phone settings. Depending on the interface version, this may appear under Settings → Phone Numbers or Settings → Phone System.
3. Open Advanced Settings and locate VoIP Deskphone (SIP).
4. Select Get Started.
5. Confirm or configure the SIP domain.
6. Create the SIP user/device.
7. Choose an extension.
8. Create a strong SIP password and store it securely.
9. Assign the device to the correct HighLevel user.
10. Configure that user’s Call & Voicemail Settings so the deskphone is enabled for the desired call-routing options.
11. Log into the physical phone’s admin interface.
12. Enter the SIP domain/server, username and password supplied by HighLevel.
13. Save the configuration and allow the handset to register.
14. Test inbound calling.
15. Test outbound calling.

A SIP Phone Is Not the Same as a SIP Trunk

This distinction is essential.

HighLevel’s physical deskphone feature is designed around SIP endpoints. You should not assume that an existing Asterisk server, 3CX PBX, RingCentral environment, VoIP.ms SIP trunk, Telnyx trunk or another outside PBX can simply be connected directly to the HighLevel deskphone SIP domain.

Can RingCentral, TELUS, 8x8, Dialpad and Other VoIP Providers Work With GoHighLevel?

In many cases, yes — but “work with” can mean different things.

A provider may support one or more of the following:

• Call forwarding into HighLevel
• Keeping the existing number during migration
• Using a verified existing number for outbound HighLevel calls
• Porting the number into HighLevel
• API or webhook-based CRM synchronization
• Hosted messaging, if the number is eligible
• Reprovisioning compatible unlocked deskphones directly to HighLevel

We are publishing dedicated setup guides for the major providers because the exact connection steps and limitations vary by platform.

What Can API and Webhook Integrations Add?

Some businesses want to keep their existing telephony provider while making more of the call data visible inside the CRM.

Depending on the provider, a custom integration may be able to synchronize caller/recipient details, direction, status, duration, agent, disposition, recording URL, voicemail events, contact information and follow-up status.

This can be valuable, but it is important not to confuse data integration with telephony integration. Logging a RingCentral, Aircall, CloudTalk or Telnyx call into HighLevel does not automatically make that provider the carrier used by the native HighLevel dialer.

Where Voice AI Fits Into a GoHighLevel Phone System

HighLevel Voice AI can be deployed as part of an inbound call flow. According to HighLevel’s current inbound-routing documentation, a Voice AI agent can answer calls directly or act as a backup after the normal routing flow is not answered. See HighLevel’s inbound routing guide.

For businesses interested in this approach, Magno Voice AI is LeadMagno’s managed AI voice solution built around automated call handling and CRM follow-up.

The Bigger Advantage: Connecting Calls to the CRM

Replacing one phone provider with another is not necessarily transformational. The bigger opportunity is connecting the call to everything that should happen next.

That is where phone-system integration becomes much more valuable than simple dial tone.

If your business is still relying on spreadsheets, manual reminders or disconnected inboxes, our CRM automation for small businesses guide explains how workflows, pipelines, triggers and follow-up can work together.

Which GoHighLevel VoIP Setup Should You Choose?

Should You Replace Your Existing VoIP Provider?

Not necessarily.

For some companies, keeping RingCentral, TELUS Business Connect, Dialpad, Teams Phone, 8x8 or another established phone platform may still make operational sense. HighLevel can become the CRM, automation or AI layer around that system.

For other organizations, moving more of the communication stack into HighLevel can reduce complexity and connect customer conversations directly with workflows and pipelines.

The right choice depends on your users, call volume, contracts, deskphone requirements, call-centre needs, SMS requirements, international calling, APIs, redundancy, compliance, AI strategy and total cost.

GoHighLevel VoIP Integration FAQs

Can GoHighLevel work with an existing VoIP provider?

Yes. In many cases, the existing provider can forward calls to a HighLevel number while additional API, caller-ID, hosted-messaging or migration options may also be available depending on the provider and number.

Can I keep my existing business number?

Potentially. You may be able to keep the number with your current carrier, use it as a verified outbound calling number in HighLevel, host eligible messaging separately, or port the number completely into HighLevel.

Can I use a physical office phone with GoHighLevel?

Yes. HighLevel supports compatible open-SIP VoIP deskphones, including documented examples from Yealink, Poly, Grandstream, Snom and Cisco.

Do I need Twilio to use HighLevel calling?

Not necessarily. HighLevel supports its LC Phone environment, while some locations may also be connected to their own Twilio environment.

Can HighLevel answer calls with AI?

Yes. HighLevel Voice AI can answer inbound calls directly or work as a backup after the human/team routing flow is not answered.

Can I use my existing number for SMS in HighLevel?

Eligible U.S. and Canadian landline and toll-free numbers may qualify for HighLevel Number Hosting, where voice remains with the existing carrier and SMS/MMS is handled through HighLevel. Eligibility and compliance requirements apply.

Can I connect my existing PBX to HighLevel with a SIP trunk?

Do not assume so. HighLevel’s physical deskphone capability is based on individual SIP endpoints. A SIP-capable deskphone is not the same thing as an outside PBX or carrier SIP trunk.

Should I forward or port my phone number?

Forwarding is usually better for testing, overflow, Voice AI or gradual migration. Porting is generally better when you are ready to make HighLevel the primary phone environment.

What happens to my phone system during a port?

Keep the old carrier active until the port has been confirmed complete. Once complete, test inbound/outbound calls, routing, messaging and other required features before cancelling the previous service.

Turn Your Business Phone Into Part of Your Sales System

A business phone should not operate as an isolated tool.

Every call represents a prospect, customer, appointment, support request or revenue opportunity.

LeadMagno helps businesses connect calling with CRM automation, AI-powered call handling, messaging, calendars, pipelines and follow-up workflows so customer communication becomes part of a connected sales and service system.

Already using RingCentral, TELUS Business Connect, 8x8, Dialpad, Ooma, Microsoft Teams Phone, VoIP.ms or another business phone provider? You may not need to replace it immediately.

LeadMagno can help assess your current setup and determine whether call forwarding, a hybrid integration, Voice AI, hosted messaging, API synchronization or a complete migration makes the most sense.