In short, Direct Routing is the most popular method of enabling external calling in Microsoft Teams. In the wider industry outside of Teams, Direct Routing is known as SIP Trunking.
You should know that there are currently two other options for enabling voice in Teams besides Direct Routing – Microsoft calling plans and Operator Connect. Learning about these other methods is also advised, but depending on your business size and needs Direct Routing may be the best option for you to activate voice.
So how does Direct Routing work? What are the features of Direct Routing and how can you enable it yourself?
How does Direct Routing work?
To be more specific, Direct Routing is the name for the toolkit which enables a connection between Microsoft Teams and an existing phone system. Without a method like Direct Routing, calling externally with Microsoft Teams using an existing phone system would be impossible.
Think of Direct Routing as a line that is connected to a business phone system at one end, and the Microsoft UI at the other.
But Direct Routing laid out like this is not secure. As part of the Direct Routing package a Session Border Controller (SBC) is deployed to fully secure a line. An important distinction to make is that a Session Border Controller (SBC) is not a firewall. An SBC is far more specialized and tailored to handle the intricate call traffic that is routed through everyday communications. Once an SBC is introduced then the Direct Routing framework is complete!
Even though Direct Routing can allow you to deploy voice with flexibility and ease, building it yourself by adding any kind of technical stack to your offering is both time-consuming and costly. There are options available however that let you deploy Direct Routing at a fraction of the cost.
Call2Teams is an example of Direct Routing as a Service (DRaaS) which allows you to instantly deploy a native Direct Routing solution without investing in any new software or hardware.