Session Border Controller (SBC)

Author: Anagha Ravi

Session Border Controller (SBC), also known as an edge device, is the equipment that sits in between your PSTN connectivity provider and your phone system. SBCs manage call setup, tear down, and other call handling.

How Bandwidth is involved with SBC

Bandwidth delivers calls to our customers from the IP address of the SBC, and customers also send outbound calls to the IP address of the SBC. It should be the only thing our customers interface with, and all of the complex network ‘hides’ behind it.

The SBC can also be useful in ‘cleaning’ traffic for our customers. For example – most carriers deliver calls in the format of “+”, “1”, and then the number (+19194393536). The SBC can, even for just one specific customer, strip off the +1 and deliver a 10-digit number if our customer cannot receive that type.

What are the benefits of Bandwidth’s SBC?

Bandwidth hosts several geo-redundant SBC pairs to connect our services to our customers.