While VoIP has gotten more popular in recent years, a new report from research firm Point Topic predicts that it will grow into a $40 billion market by 2015. The report looked at global fixed line services, which does not include services such as Skype.

Oliver Johnson, the CEO of Point Topic, spoke with us and said that the real growth would be in services such as Skype. He also told us that this growth should be taken with caution since there are many challenges in the space. For instance, the VoIP market faces technical and mobile challenges as well as pushback from regulators.

Despite the challenges, Johnson expressed optimism about the future of VoIP.