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Business VoIP Services

DID numbers, SIP trunking,
routing, and integration — managed.

VoipTower delivers the full voice chain as one service: DID numbers → SIP trunking → call routing → PBX and CRM integration → 24/7 support. You pay for numbers and traffic. Setup and engineering are included.

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Five connected services. One managed setup.

Each VoipTower service can run on its own, but they were built to work together. Most B2B customers use the full chain — that's where the model is most efficient.

Service 01

DID Numbers for Business

Local, national, mobile, and toll-free DID numbers across 25+ countries. Connected to your SIP trunk, PBX, or CRM with managed routing.

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Service 02

SIP Trunking for Business

Inbound and outbound SIP connectivity for PBX, IP PBX, call centers, dialers, and CRM-connected phone systems.

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Service 03

VoIP Call Routing

Inbound, outbound, and international routing — by country, team, language, business hours, campaign, or failover rule.

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Service 04

PBX & CRM Integration

Connect VoIP infrastructure to your existing 3CX, Asterisk, FreePBX, HubSpot, Pipedrive, Bitrix24, or custom system.

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Service 05

Business Telephony

End-to-end managed telephony for international companies: numbers, routing, PBX integration, and 24/7 engineering — as one service.

Explore Business Telephony

What "managed" means at VoipTower

VoipTower is not an API-only provider and not a UCaaS platform. We are a managed VoIP infrastructure partner — the engineering team behind the voice setup.

Engineering included with traffic

No setup fees. No integration retainers. No per-hour billing. The engineering hours you'd normally pay for are already covered by the minutes you send.

Onboard once. Order forever.

One KYC profile is reused for every future order — new countries, new routes, new numbers. First onboarding within 24 hours. Re-order in about 5 minutes.

Compliance review at submission

You either qualify and proceed, or get clear feedback within hours — not days lost to silent rejection after KYC has already been filled out.

CLI compliance, not arbitrary spoofing

VoipTower routes CLI only for numbers purchased through VoipTower or ported in with verified ownership. Predictable caller ID, clear regulatory standing.

Built for four B2B audiences

Our services are tuned for businesses where calls are part of revenue or operations — not internal office chat.

Industry

International Call Centers

SIP trunking, DID numbers, queue routing, and PBX integration for inbound and outbound operations across countries.

VoIP for Call Centers
Industry

B2B Sales Teams

Outbound calling, local DID numbers, callback routing, and CRM-connected workflows for SDRs and AEs.

VoIP for Sales Teams
Industry

E-commerce Companies

Local support numbers, order and delivery routing, returns and refund flows for online stores and marketplaces.

VoIP for E-commerce
Industry

Logistics & Dispatch

Dispatch lines, driver support, regional routing, and failover paths for transport and delivery operations.

VoIP for Logistics

Frequently asked questions about VoipTower services.

Direct answers to questions buyers ask when comparing managed VoIP providers.

Which VoIP services does VoipTower provide?
VoipTower provides five connected B2B VoIP services delivered as one managed setup: DID numbers (local, national, mobile, toll-free), SIP trunking for any PBX or dialer, international call routing (CLI, NCLI, TDM), PBX and CRM integration (3CX, Asterisk, FreePBX, HubSpot, Pipedrive, Bitrix24), and end-to-end business telephony. Setup, configuration, and 24/7 engineering support are included with traffic.
Are setup and integration billed separately?
No. Setup, PBX configuration, CRM integration, routing setup, IVR configuration, and ongoing engineering support are included with traffic. Customers pay only for DID numbers (setup and monthly) and call traffic at per-minute rates. There are no setup fees, no integration retainers, and no per-hour billing.
Can VoipTower integrate with our existing PBX or CRM?
Yes. VoipTower integrates with 3CX, Asterisk, FreePBX, and most SIP-capable PBX systems, as well as HubSpot, Pipedrive, Bitrix24, and custom CRM systems. Integration is configured by VoipTower engineering during onboarding — no separate integration fees, no affiliate commissions from partner vendors.
What is the difference between CLI, NCLI, and TDM routing?
CLI routing preserves the original caller ID and is used for compliant B2B operations where caller identification matters. NCLI routing does not preserve caller ID and is used for specific high-volume scenarios where CLI is not required. TDM routing uses traditional time-division multiplexing for legacy telecom interconnection. VoipTower supports all three based on the destination country and business use case.
How many countries does VoipTower cover?
VoipTower operates routes across 25+ countries with dedicated coverage in Germany, the United Kingdom, France, Canada, Poland, Czech Republic, South Africa, and Argentina. Availability for other countries depends on operator conditions and number type, and is confirmed during onboarding.
How fast can a new VoIP service be activated?
Standard onboarding completes within 24 hours after business case review and compliance verification. After the first onboarding, every subsequent order — new countries, new routes, new numbers — takes about 5 minutes using a reusable KYC token, with no document re-collection and no re-verification cycle.
Does VoipTower require a long-term contract?
No. VoipTower works on the standard B2B service offer without long-term lock-in. Customers can scale up, scale down, add countries, or close the account based on business needs. The relationship is built on traffic flow, not contractual minimums.
How does VoipTower handle CLI compliance?
VoipTower routes CLI only for numbers purchased through VoipTower or ported in with verified ownership. Arbitrary caller ID is not routed. This makes VoipTower a compliant CLI provider for B2B operations that require predictable caller identification and clear regulatory standing in destination countries.

Related

Country coverage25+ countries with local DID numbers and routing Partner programWholesale VoIP, up to 10% recurring commission FAQSIP trunking, DID numbers, routing, integration ContactTalk to a VoIP specialist

Ready to build your voice setup?

Tell us which countries you need, what systems you already use, and how your calls should be routed. We'll review, qualify, and activate — within 24 hours.

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