Voice is growing and Teams is at the centre. Providers who integrate voice natively are growing faster than those who do not. (Source: Cavell Group Cloud Communications Market Reports Q2 2024)
Call2Teams Direct Routing
Call2Teams Direct Routing connects any PBX or SIP Trunk to Microsoft Teams natively — certified, carrier-grade, and running for over one million users today. Rapid go-to-market. Full white-label control. Provisioned and calling in under ten minutes.

Your customers are already in Teams, voice should be too.
Microsoft Teams is now the default collaboration surface for the businesses your customers run. But a Teams licence does not include voice — and most customers are not going to figure out the integration on their own. That is the gap, and it is yours to fill.
The risk of doing nothing is concrete: a competitor fills the gap, the customer relationship weakens, and the ARPU opportunity disappears. Call2Teams Direct Routing is built to close that gap — fast, under your brand, and without disrupting what your customers already have.
Voice is not going away
AI is pulling new revenue into voice
AI tools are making Teams calling more valuable — co-pilot features, transcription, coaching. Providers who own the voice layer own the relationship with those tools.
Customers want low-risk adoption
Most businesses do not want to rip out their PBX to get Teams voice. Direct Routing preserves their existing infrastructure and phone numbers — they get Teams calling without starting over.
Two ways to bring voice into Teams
Call2Teams Direct Routing supports two integration pathways. Both deliver native Teams calling. Your choice depends on how your customer's telephony is set up today.
Call2Teams for PBX
Direct Routing for PBX connects your customer's existing PBX or UC platform to Microsoft Teams — so end users get native Teams calling while keeping the full functionality of the PBX they already know. Hunt groups, call routing, IVR, voicemail — all still there. Plus the full Teams feature set on top. Fully UC-agnostic: works with any SIP-capable PBX or call control platform.
Call2Teams for SIP Trunks
Direct Routing for Trunks voice-enables Teams without touching the PBX — it maps your customer's existing phone numbers and SIP Trunks directly into the Teams environment. Customers keep their numbers, keep their call plan, and get the full Teams calling experience without changing their underlying infrastructure.
Ready to add Teams voice to your portfolio?
Built-in capabilities you will not find elsewhere
Every Call2Teams Direct Routing deployment ships with three capabilities that solve problems other solutions leave for the customer to work around.
TruState™ is a patented Call2Teams capability that ensures your PBX correctly reflects the on-hook / off-hook state of a user after a call is transferred within Teams. Without it, PBX line-state gets out of sync after Teams transfers — leading to blind transfers, missed calls, and inaccurate presence. With TruState™, call management is accurate, call analytics are reliable, and users stop losing calls in transit. Built in as standard. No configuration required.
DET routes emergency calls from Microsoft Teams to your chosen Emergency Routing Service Provider (ERSP), automatically passing accurate location data (PIDF-LO). It works with any compatible PBX or SIP Trunk and removes the need for your customer to handle emergency routing separately. For US deployments, DET addresses Ray Baum's Act 2018 and Kari's Law 2018 compliance requirements. For other markets, it ensures emergency calls are handled correctly regardless of where the user is calling from.
AutoSync reduces the manual overhead of keeping user data in sync between Teams and the PBX — enabling enterprise app authentication and eliminating repetitive manual syncs. Zero Touch Provisioning gives your partners the tools to shape their customers' digital provisioning journey: custom management portals, API-driven workflows, and branded onboarding experiences. Together, AutoSync and ZTP cut provisioning time to under ten minutes and give you full control over how your customers experience the product.

Three branding tiers, one platform
Call2Teams Direct Routing can go to market under the Call2Teams brand, a partial brand, or your full brand. Choose the level that fits your GTM timeline and channel positioning.
Call2Teams Brand — Instant GTM
Resell Direct Routing under the Call2Teams brand. No branding work needed — go to market immediately and build the business case before investing further.
Brand Essentials — ~1 week GTM
Your logo, favicon, and support links on the portal. Partial brand experience with a short implementation window.
Brand Complete — ~4–6 weeks GTM
Full brand ownership. Custom domain, your Microsoft publisher name and consent screen, no Dstny or Call2Teams visibility. Your customers see only your brand.
Go-to-market in days
Partner onboarding runs two parallel workstreams — technical and commercial — so neither blocks the other. The goal is to reach "ready to sell" status in days, not weeks.
1. Pre-boarding + legal
We start with a Statement of Work to understand your requirements — branding tier, SKU setup, interoperability needs. Legal runs in parallel to avoid delays. Both workstreams close together before tech onboarding begins.
2. Technical onboarding
Setup, interoperability testing, call testing, and API support. We get you to technical readiness — confirmed calling works end-to-end with your PBX or Trunk infrastructure before any customers are provisioned.
3. Admin and commercial onboarding
Branding setup, SKU configuration, portal access, and contract structure. Commercial readiness runs alongside technical onboarding — so both finish at roughly the same time.
4. Training and GTM support
Product training is delivered by our Product Sales Specialist and support teams. We share collateral and run sales-led meetings to support your GTM readiness. You do not go to market alone.
5. Ready to sell
Account live. Service ready for customer provisioning. You are in market — with a tested integration, a trained team, and GTM collateral in hand. From here, customer accounts take under ten minutes to provision and users can be calling in Teams the same day.

Case study
When South African telco Dream ICT needed to integrate Microsoft Teams telephony with their PBX proposition cost-effectively, Call2Teams Direct Routing delivered smooth onboarding, seamless integration, and a clear market advantage — while reducing cost and complexity for their customers.
Trusted locally and globally by the best










Frequently asked questions about Call2Teams Direct Routing
Dstny Call2Teams Direct Routing is a Microsoft Teams voice integration solution for service providers. It connects any SIP-capable PBX or SIP Trunk to Microsoft Teams, enabling native Teams calling for end users without replacing their existing infrastructure. The service is certified, carrier-grade, and globally deployed — running for over one million users making millions of calls every day. Service providers can take it to market under the Call2Teams brand, a partial brand, or their own full brand.
Call2Teams Direct Routing for PBX connects an existing PBX or UC system to Microsoft Teams — combining the full Teams feature set with the PBX's existing call routing, hunt groups, and IVR capabilities. It includes TruState™, AutoSync, Zero Touch Provisioning, and DET. Call2Teams Direct Routing for Trunks connects Teams directly to a SIP Trunk, allowing customers to keep their existing phone numbers and call plans (BYOC) while gaining native Teams calling. Both pathways require a Microsoft Teams Phone Standard license per user.
TruState™ is a patented Call2Teams capability that ensures accurate PBX line-state visibility after a call is transferred within Microsoft Teams. Without it, PBX systems can lose track of whether a user is on a call or not after a Teams transfer — resulting in blind transfers, dropped calls, and inaccurate presence. TruState™ corrects this by keeping the PBX accurately informed in real time. It is built into Call2Teams Direct Routing for PBX as standard — no configuration required.
Partner onboarding runs in days. Technical and commercial workstreams run in parallel, so there are no sequential bottlenecks. Once onboarded, customer account setup takes under ten minutes — from account creation to users making their first Teams call. For partners choosing the Call2Teams brand tier, go-to-market is essentially immediate. Brand Essentials adds approximately one week; Brand Complete adds approximately four to six weeks for the full white-label implementation.
Yes. Call2Teams Direct Routing offers three branding tiers. Brand Essentials adds your logo, favicon, and support links to the portal in approximately one week. Brand Complete gives full brand ownership — custom domain, Microsoft publisher consent screen with your name and logo, no third-party software visibility — in approximately four to six weeks. Service providers choosing Brand Complete have complete brand presence in the channel with no Dstny or Call2Teams visibility to their end customers.
Also in the Call2Teams family

Call2Teams Operator Connect
The Microsoft-certified Operator Connect pathway. Purpose-built for operators and carriers who want native Teams integration with simplified licence management and Microsoft-backed certification.

Call2Teams Mobile
Bring mobile calling into Microsoft Teams. Call2Teams Mobile connects mobile numbers and fixed-mobile convergence to the Teams environment — for organisations where mobile is the primary calling device.


Voice-enable Teams for your customers today
Rapid onboarding. Full white-label control. Proven at scale. Talk to the team.