Connect your PBX, CRM,
numbers, and routing — with our help.
Your phone system and CRM should work together, not in parallel. We set up the SIP trunk, codecs and routing of your numbers to your PBX — 3CX, Asterisk, FreePBX or another SIP-capable system — and help on your PBX side. We help connect calls to your CRM through your PBX or dialer — free, in the same chat. CRM-side development stays with your team or your CRM vendor. No engineering or integration fees, no per-hour billing; each number has a setup and monthly fee, listed on the pricing page.
Your phone system and CRM should work together.
Most companies have both — a PBX for calls, a CRM for customer data. They just don't talk to each other. Sales calls don't show in pipeline. Support agents don't see the right record. Routing isn't linked to teams, campaigns, or workflows.
What goes wrong without integration
Missed call context. Manual call logging. Poor customer visibility. Unclear callback ownership. Calls routed to the wrong team. CRM records not connected to phone activity. PBX setup that doesn't match sales or support workflows. No clear connection between DID numbers, SIP trunking, and routing.
What VoipTower does instead
Connects voice infrastructure with the systems your team already uses. Numbers, SIP trunk and routing to your PBX from us; help on your PBX and CRM side in one chat. We have no referral or partner arrangements with PBX, CRM or dialer vendors — recommendations follow technical fit. No forced platform switch. Setup and help are part of the service.
What is PBX & CRM integration?
PBX and CRM integration means connecting your business phone system with your customer management system. The PBX handles calls. The CRM stores customer, lead, sales, or support data. When they work together, your team manages calls with context — who's calling, why, and what should happen next.
In a VoIP setup, integration often combines with SIP trunking, DID numbers, and call routing. The full chain: DID number → SIP trunk → routing → PBX → CRM → support.
PBX integration
3CX, Asterisk, FreePBX, IP PBX, and most SIP-capable systems. Calls arrive at your PBX, which routes them into extensions, queues, IVR menus, departments and business-hours rules.
CRM connection
CRM: calls connected through your PBX or dialer — we help. CRM-side development stays with your team or your CRM vendor.
SIP trunking + PBX
SIP trunks register with your PBX and carry inbound and outbound calls. The bridge between DID numbers and your phone system.
DID number + CRM workflows
Each DID gets a clear purpose tied to a CRM workflow — sales, support, country, campaign, department.
How VoipTower sets up the connection.
Setup is not a checkbox. It's configuration, testing, and changes after launch. We set up the SIP trunk, codecs and routing of your numbers to your PBX, and help on your PBX side — in the same chat. Your PBX, dialer and CRM stay yours.
PBX connection
SIP trunk registers with your PBX. Codec, transport and authentication configured to match your environment.
CRM connection
We help connect calls to your CRM through your PBX or dialer — free, in the same chat. CRM-side development stays with your team or your CRM vendor. Usually that is your CRM's own telephony connector.
DID number routing
Each DID number gets a clear destination — sales queue, support team, country routing, campaign tracking, dispatch line.
Inbound and outbound routing
Each number goes to the PBX destination you choose; routing by country, business hours, language, department, campaign or agent group lives in your PBX. If your team doesn't answer, the call goes to a backup number you choose — set in your PBX, and we help.
International setup
Local DID numbers in several countries, routed over SIP trunks to your PBX.
Testing, launch, ongoing changes
Test calls before launch. Your request is reviewed within about 24 hours of submission; first number per country follows the ETA on the pricing page. Trunk and routing changes after launch — included; help on your PBX/CRM side in the same chat.
PBX & CRM integration in real operations.
Different industries integrate differently. Call centers connect to queues and campaigns. Sales teams connect to pipelines. E-commerce to support workflows. Logistics to dispatch and driver records.
Integration for call centers
Inbound calls linked to customer records. Campaign numbers connected to CRM workflows. Routing by country, language, or team. DID numbers connected to queues. Call tracking by campaign or market. Callback routing.
VoIP for call centersIntegration for B2B sales
Outbound calls from CRM. Inbound callbacks to the right rep. Local DID numbers per market. Call tracking by campaign. Routing by country or sales region. SIP trunk to sales phone system. Visibility for managers and reps.
VoIP for sales teamsIntegration for e-commerce
Customer calls linked to support records. Routing by country or store. Order support lines. Returns and refund support. Local DID numbers for markets. Support routing by language. A backup number you choose if the team doesn't answer during busy periods.
VoIP for e-commerceIntegration for logistics
Dispatch calls routed by region. Driver support lines. Customer callback numbers. Branch or warehouse routing. Priority routing. Call records connected to customer or delivery context. A backup number you choose if a team doesn't answer.
VoIP for logisticsHow an integrated call actually flows.
From a customer dial to your team answering — with full context — in five steps.
- The customer dials a DID number. Local German number, UK number, Canadian number — whichever makes them comfortable calling.
- VoipTower routes the number to your PBX. Each number is routed to your PBX; queues, business hours and IVR live in your PBX, and we help on the PBX side.
- The SIP trunk delivers the call to your PBX. PBX picks up the call and routes it inside your business — extension, queue, IVR menu, department.
- Your PBX or dialer passes the call to your CRM. Through your CRM's own telephony connector the record is matched and history shown — as your CRM is set up. We help set up the connector; CRM-side development stays with your team or your CRM vendor.
- Your team answers — with context. Agent sees who's calling, what's happening, and what should happen next. No "let me find your file" pause.
Supported systems.
VoipTower works with the systems most B2B teams already use. No forced platform replacement.
PBX systems
3CX — IP PBX with full SIP trunk support, queues, IVR, extensions.
Asterisk — open-source PBX, fully customizable, common in call centers.
FreePBX — Asterisk-based UI for simpler administration.
IP PBX — most SIP-capable systems with standard registration.
CRM systems
Sales CRMs — call-to-deal connection, pipeline activity logged against live calls.
Support & service platforms — tickets and customer records surfaced to agents on inbound calls.
All-in-one business suites — unified contact, deal, and call history across the team.
Your CRM — We help connect calls to your CRM through your PBX or dialer — free, in the same chat. CRM-side development stays with your team or your CRM vendor.
Dialer platforms
Outbound dialer integration via SIP trunk for B2B sales, call center campaigns, and outbound support operations.
Contact center platforms
Connections to dedicated contact center software where SIP trunking and DID-based routing replace traditional carrier setups.
Why integration from VoipTower.
Six reasons teams use VoipTower for PBX and CRM connectivity.
Better customer context
Calls reach your CRM through your PBX or dialer. Sales, support, and operations teams respond faster with full context.
Less manual work
No manual call logging. No searching for customer records after the call starts. Cleaner handling.
Better routing for teams
Numbers routed to your PBX; routing by country, team, department, campaign or business hours lives in your PBX, and we help set it up — including a backup number you choose if a team doesn't answer.
Use your existing systems
3CX, Asterisk, FreePBX and other SIP-capable PBXs; calls reach your CRM through your PBX or dialer. Your PBX, dialer and CRM stay yours.
International teams supported
DID numbers in several countries, SIP trunks and routing to your PBX — supported in one chat.
Changes after launch — included
Teams grow. Campaigns change. Countries are added. Trunk and routing changes after launch — included; help on your PBX/CRM side in the same chat.
Integration across 25+ countries.
Numbers, SIP trunk and routing to your PBX from us; help on your PBX and CRM side in one chat. Priority markets:
🇩🇪 Germany
Local German DIDs routed to your PBX, with calls reaching your CRM through it.
Germany coverage🇬🇧 United Kingdom
UK DIDs routed to 3CX, Asterisk, FreePBX or your PBX.
UK coverage🇫🇷 France
French DIDs routed to your PBX queues.
France coverage🇨🇦 Canada
Canadian DIDs into IP PBX and CRM for cross-border B2B teams.
Canada coverage🇵🇱 Poland
Polish DIDs routed to 3CX, Asterisk or your PBX.
Poland coverage🇨🇿 Czech Republic
Czech DIDs and PBX/CRM connections for regional B2B operations.
Czech Republic coverage🇿🇦 South Africa
South African DIDs routed to your PBX.
South Africa coverage🇦🇷 Argentina
Argentine DIDs routed to your PBX, with calls reaching your CRM through it.
Argentina coverageFrequently asked questions about PBX & CRM integration.
Direct answers to common questions about phone system integration, CRM workflows, and VoIP infrastructure.
What is PBX and CRM integration for business VoIP?
How does PBX integration work with SIP trunking?
Can DID numbers be connected to a PBX and CRM?
How does CRM integration help with VoIP calls?
Do I need SIP trunking for PBX integration?
How does call routing work with PBX and CRM integration?
Can VoIP be integrated with my existing CRM?
Is PBX and CRM integration useful for call centers?
Is PBX and CRM integration useful for sales teams?
Can PBX and CRM integration support international calls?
What is the difference between VoIP integration and UCaaS?
Can VoipTower help if we already have a PBX?
Connect your PBX, CRM, and VoIP infrastructure.
Tell us what PBX and CRM you use, which countries you call, and how your calls should be routed. We'll set up the trunk and routing to your PBX and help with the CRM connection; your request is reviewed within about 24 hours of submission, and the first number per country follows the ETA on the pricing page.