Voice infrastructure
built around real call flows.
A call center routes calls differently from a logistics dispatcher. A B2B sales team uses local numbers differently from an e-commerce support desk. 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.
Four industries we know in detail
Each industry page covers the typical setup, common problems, and the routing pattern that actually works in daily operations.
International Call Centers
SIP trunking, DID numbers by country and campaign, and routing to your PBX for inbound and outbound operations.
VoIP for Call Centers →B2B Sales Teams
Outbound calls with local caller ID and callback routing to your PBX for SaaS and outsourcing teams. CRM: calls connected through your PBX or dialer — we help.
VoIP for B2B Sales →E-commerce Companies
Local support numbers, order and delivery routing, returns and refund flows for online stores and marketplaces.
VoIP for E-commerce →Logistics & Dispatch
Dispatch lines, driver support routing, and branch and warehouse numbers, each routed to your PBX. If your team doesn't answer, the call goes to a backup number you choose — set in your PBX, and we help.
VoIP for Logistics →The same services. Configured per industry.
VoipTower sells two products: DID numbers and outbound pools. Other destinations are available as a managed route on request, after the destination has been vetted. Every industry gets the same products and services; the difference is how they are wired together for your call flow.
DID Numbers
DID numbers in 50+ countries. Number types and the current ETA for each country are on the pricing page; other types on request.
Learn more →SIP Trunking
Inbound and outbound SIP connectivity for any PBX or dialer.
Learn more →Wholesale SIP Trunking
Per-customer number pools on listed directions for volume buyers and resellers — numbers, traffic, and engineering under one contract.
Learn more →PBX setup & CRM connection
SIP trunk set up to your existing 3CX, Asterisk, FreePBX or other SIP-capable PBX. CRM: calls connected through your PBX or dialer — we help.
Learn more →Business Telephony
For international companies: numbers, SIP trunk and routing to your PBX from us; help on your PBX and CRM side in one chat.
Learn more →Tell us what you're building.
Call center, sales team, e-commerce, logistics — or something else. Share the call flow you need, and the engineers who would configure it come back with a proposed setup.