Skype as a desktop communication tool is largely popular with consumers and businesses alike, yet its mobile app leaves much to be desired. Whether it’s the slow VoIP service or limited communication features, there’s definitely a lot of room for improvement.

It’s easy to get lost in the confusion of FXS and FXO, especially if you’re a complete novice in matters of VoIP (Voice over Internet Protocol). These terms are often used in the telecom world, and understanding their difference is the first step in choosing the right VoIP system that best suits your needs.