Microsoft Teams Direct Routing

Enable enterprise-grade voice communication within Microsoft Teams using ASTP’s Direct Routing solution — a flexible, cost-efficient alternative to Microsoft Calling Plans with full PSTN connectivity and cloud-hosted SBCs certified by Microsoft.

Empower Teams with Cloud Voice Integration

Microsoft’s Phone System feature within Teams enables hosted PBX and call control capabilities directly in the Office 365 environment. With the right licensing, organizations can replace legacy PBXs with modern, cloud-based voice functionality.

To connect the Teams Phone System with the PSTN, two options are available:

Microsoft Calling Plans

Uses Microsoft’s incumbent Telco routing.

Direct Routing

We manage updates and uptime so you can focus on your customers.

Enables organizations to use their own telephony carrier for PSTN access, offering more flexibility, control, and cost benefits

*Note that E1 or E3 licensed users will require an add-on Phone System license. The Phone System license is included in the E5 license.

ASTP Direct Routing – Powered by Azure and Certified SBCs

The ASTP Direct Routing solution is built on diverse Microsoft Certified SBCs hosted within Microsoft Azure. Through these secure and scalable gateways, VoiceHub connects your Teams Phone System with external networks, ensuring high availability and guaranteed call quality.

The solution supports white-label deployment via a generic domain, allowing partners and resellers to offer Microsoft Teams Direct Routing under their own brand.

For organizations requiring full customization, ASTP also offers dedicated SBC resources configured specifically for each tenant, enabling full control and minimal setup within the Teams environment.

Flexible Integration Options

Integrate directly through SMPP bind or REST API to send bulk SMS, power chatbots, automate alerts, or deliver marketing campaigns.

Bulk SMS

High-volume messaging for campaigns and customer notifications.

Chatbots & Automation

Enable two-way conversations and system-triggered alerts.

Security & Authentication

Send MFA and OTP codes instantly.

Marketing & Engagement

Create SMS-based outreach for your customers.

Key Features

Hosted in the Microsoft Azure Environment

Built on Microsoft Certified SBCs

Managed access from VoiceHub into the Azure environment

Secure connectivity to supplier and PSTN networks

Redundancy through diverse Azure Regions

Complete A–Z call routing coverage

Flexible Deployment Options

Provision inbound numbers including virtual mobile, 13/18, and international access numbers

White-labeled deployment via generic domain

Dedicated SBC model available for exclusive use*

* TLS certificate must be provided for the requested domain. The configuration requirement within Microsoft Teams is minimal to implement direct routing within a customer tenant : addition of a defined domain and addition or modification of the voice routing policy.

Pricing

Bundled plans with minute inclusions
Pay for usage – channel and call cost based on A-Z
Split billing feed per tenant
Managed re-bill service if you do not own your own rating / billing system

Ready to Enhance Microsoft Teams with Direct Routing?

Connect Microsoft Teams to the global PSTN with ASTP’s certified SBC infrastructure and Azure-hosted routing solution. Gain flexibility, cost efficiency, and enterprise-grade reliability—all within your Teams environment.