Many businesses are implementing VoIP over PBX as VoIP operates over your data network, instead of phone lines, which introduces additional network considerations when you implement this system. Another reason is voice data gets processed alongside other types of data, instead of through its own dedicated line, therefore, you need to approach network optimization to ensure a high-quality customer service experience. Read more at: http://it.toolbox.com/blogs/voip-news/5-ways-to-optimize-your-network-for-your-voip-solution-70226