Christian Hemker

Information & Communications Technology

Microsoft 365 Teams-Telephony Change Management

Münster, North Rhine-Westphalia, Germany

PSTN telephony with Microsoft Teams through Direct Routing

Many are already using Microsoft Teams to talk with customers and colleagues. But Teams can also be used to call PSTN numbers or receive calls from PSTN. That makes Teams the ultimate communications tool.

This session shows different options to connect teams to PSTN. What are the advantages or disadvantages?
What do I have to configure?
What infrastructure is needed?


Christian Hemker

Senior IT Consultant, busitec GmbH

Christian started his IT career in 2000 with a Fachinformatiker apprenticeship.
After some years in a small IT company providing Microsoft and Notes/Domino Solutions, he worked as a Freelancer for 9 years.
His freelance work consisted of IT trainings as Microsoft Certified Trainer (MCT), SharePoint Premier Support at Microsoft and several customer SharePoint projects.
From 2013 on, he was employed at T-Systems as a technical project lead and consultant for SharePoint.
Since 2019, he is working for busitec as a consultant for Microsoft 365, specializing in Teams/SharePoint Online, security and device management/deployment.

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