Global SIP Trunking. One infrastructure for your telephony worldwide.
Companies operating multiple locations across different countries know the problem. Different carriers, different contracts, different number structures and nobody with a clear overview of the whole picture. That is exactly what Global SIP Trunking solves. With a central, IP-based voice infrastructure we consolidate your telephony, whether you have three or thirty locations, whether you use Microsoft Teams, Cisco, 3CX or another UC platform. And we operate all of it for you, with our own SBC infrastructure in Europe, the USA and APAC.
Not just a SIP connection. A global voice platform.
SIP Trunking is standard practice for many businesses today. But the difference lies not in the protocol but in the infrastructure behind it and the people who operate it. weSystems operates its own Session Border Controllers at multiple locations in Europe, the USA and the Asia-Pacific region. For you that means low latency to your locations, genuine redundancy and a team that knows what to do when something goes wrong, because they built the platform themselves.
We handle the complete carrier coordination, port your existing phone numbers worldwide and set up SIP trunks to your UC platform. Whether that is Microsoft Teams Direct Routing, a Cisco environment, 3CX or another telephony system, we know the interfaces because we configure and operate them every day.
A concrete result we see regularly in practice: by consolidating carriers and number structures onto a central platform, ongoing telephony costs can be reduced by up to 30 percent in many cases. That is not a marketing promise but a figure that can be verified after migration by directly comparing telephone bills before and after.
What you gain when your telephony truly becomes central.
Global reach, own infrastructure
DIDs and phone numbers in over 55 countries, toll-free numbers in over 120 countries. Operated via weSystems' own SBC infrastructure in EMEA, USA and APAC. No routing through third-party carriers without visibility or control.
HD voice quality and QoS
Carrier-grade voice quality with HD voice support, stable latency and prioritised voice traffic through Quality of Service technologies. No noise, no delays, no dropped calls.
High availability and redundancy
Redundant SBC infrastructure, encrypted transmission via TLS and SRTP, DDoS protection and integrated firewall connectivity. Failover scenarios are defined and tested in advance. Your telephony keeps running even when something goes wrong.
Cost reducation through
carrier consolidation
Many companies pay for redundant carrier contracts, unused number blocks and complex local billing structures. We analyse your situation and consolidate where it makes economic sense. The saving is measurable.
Number porting worldwide
Existing phone numbers are retained. We coordinate the porting with releasing carriers, configure the SIP trunks and carry out technical tests and cutover together with you. Each location is signed off with documented acceptance testing.
Compatible with your existing UC platform
Microsoft Teams via Direct Routing, Cisco CUCM, 3CX, Avaya, Unify, Asterisk and more. We configure the connection to your existing environment and adapt routing logic, dial plans and fallback scenarios to your requirements.
Central number management
All DDIs and service numbers are managed centrally. Changes, extensions and portings run through one contact, not three different carriers with three different portals.
Managed service with 24/7 support
We operate the platform as a managed service to ISO 27001 standards. Monitoring, incident management, change management and 24/7 support are included. When something goes wrong, you call someone who knows your infrastructure.
What customers say who have
already taken this path.
DB Schenker operates a global voice platform and has created a central solution for all national subsidiaries. Telephony is a central element in communication with our business partners and is business-critical for us as a globally operating logistics company. From project management through consulting to technical support, we have been and continue to be very successfully supported by our partner weSystems. We look forward to continuing our good and collaborative partnership.
Kuno Pfeiffer, Service Manager, Schenker AG
Telephony is business-critical. We know that that means.
When telephony fails, contact with customers, partners and locations stops. For a company like DB Schenker, which operates globally and relies on reliable voice communication every day, that is not a theoretical consideration. It is reality.
We work with companies for whom telephony is not just an IT task but a business-critical process. That is why we do not work with standard packages that more or less fit, but analyse the existing carrier and number landscape, develop a concept and implement it in a structured way. With clear handovers, defined cutover plans and acceptance documentation per location, so that nothing gets lost and nothing comes as a surprise.
And because we also operate the platform afterwards, we already think about operations during the design phase. What is configured well causes no problems in operation.
Related Services
Direct Routing for Teams
You use Microsoft Teams and want to handle telephony within it too? Direct Routing connects your Teams tenant to the public telephone network via our SBC infrastructure. We handle configuration, operations and support.
Cloud SBC Management
You already have SBC infrastructure and want to outsource the operations? We take over the complete management of your Session Border Controllers, including monitoring, patch management, licences and 24/7 support.
Voice Migration
You want to migrate from a classic PBX or another system to a modern voice platform? We accompany the entire migration process, from analysis through porting to go-live.
Frequently asked questions
What is a Global SIP Trunk?
A Global SIP Trunk is a central, IP-based voice connection through which businesses can make calls worldwide using a single connection for all locations. Instead of local carrier contracts per country, there is one unified platform with central control and billing.
What are the benefits of SIP Trunking for businesses with multiple locations?
Fewer carrier contracts, unified number management, lower call charges through consolidation and a central platform operated by a team with full oversight. From our experience we know that ongoing telephony costs can be reduced by up to 30 percent through carrier consolidation in many cases.
Does weSystems operate its own SBC infrastructure?
Yes. weSystems operates its own Session Border Controllers in Europe, the USA and the Asia-Pacific region. This enables low latency, genuine redundancy and a direct point of contact who built and knows the infrastructure.
Which UC platforms are supported?
We are compatible with all major platforms including Microsoft Teams via Direct Routing, Cisco CUCM, 3CX, Avaya, Unify and Asterisk. The connection is configured individually, including dial plans, routing logic and fallback scenarios.
Can I keep my existing phone numbers?
Yes. We coordinate the number porting with releasing carriers worldwide, configure the SIP trunks and carry out technical tests and cutover together with you. Existing number blocks are retained.
What happens if an SBC fails?
Our SBC infrastructure is designed with redundancy. Failover scenarios are defined and tested in advance so that telephony continues without interruption even if a component fails.
How secure is Global SIP Trunking at weSystems?
Very secure. All transmissions are encrypted via TLS and SRTP. DDoS mitigation and firewall connectivity additionally protect the platform. weSystems is certified to ISO 27001:2022.
Is emergency calling supported via SIP Trunking?
Yes. Emergency calls are supported as standard, including automatic routing to the nearest emergency centre with location identification.
How is billing handled?
Billing is transparent on a per-second basis. Monthly reports break down call charges by country so that cost drivers can be identified and addressed early.
How quickly is SIP Trunking ready to use?
Setup typically takes a few business days. For projects involving multiple locations and number portings we agree a structured project plan with you so that every cutover is controlled and documented.