CompTIA Network+

Answer: C - Using the Virtual PBX system allows companies to save a considerable amount of cost and responsibility when planning how the company will handle call routing or switching.

Key Takeaway: Virtual PBX or “Hosted PBX” is a phone system offered by already established telecommunications providers. The system offers telephone services such as conference calling, call forwarding, voicemail and many other call features. For the phone systems necessary to run these features companies would have to invest heavily to build them on their own, however at a reasonable cost, they can lease these services from providers. The drawback is that now the company is dependent on these providers to maintain the level of service required.