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John Casselman

@johncasselman

Joined March 2024
  • author
  • twitter-flat author
John Casselman is the sales engineering manager for Ooma Enterprise. As an accomplished senior solutions architect, he has years of experience in Unified Communications, cloud service delivery and networking. John worked for Five9 and ShoreTel before joining Ooma in 2019.

Latest posts by John Casselman

The evolution of the Public Switched Telephone Network (PSTN)
  • October 4, 2024
What is PSTN? The Public Switched Telephone Network, or PSTN, has been the heart of global telecommunications since its humble beginnings in the late 19th century. Read about how it has evolved from copper wires and analog signals into a complex network, supporting not only voice but a variety of modern data services. [Read More]
Posted in Business Blog
Understanding internet data usage at home
  • July 2, 2024
Do you know how much internet data you use at home? Whether you're streaming movies, gaming or just browsing, knowing how much data you need can make a big difference in your experience and what you pay for your internet services. [Read More]
Posted in Home Phone Blog
Copper thefts are impacting critical infrastructure for business
  • May 21, 2024
U.S. businesses have been negatively impacted by theft of the copper wire used in critical infrastructure systems, including traditional phone lines. Read about how switching from POTS phone lines to Ooma AirDial can ensure your emergency and safety systems stay running smoothly. [Read More]
Posted in Blog
What is an SBC? All about Session Border Controllers
  • March 22, 2024
With the rise of cloud-based telephony solutions, ensuring a secure and optimized communication environment has become more important than ever. Enter session border controllers, or SBCs. These network elements play a crucial role in managing and securing the flow of real-time communication sessions. [Read More]
Posted in Business Blog
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