Voice over Internet Protocol (VoIP) or IP telephony is the transmission of voice and multimedia over the internet protocol. It is enabled by a group of technologies and methodologies used to deliver voice communication over the internet and other networks. Most businesses today use a combined network for voice and data that runs VoIP for Calling. To deploy VoIP there are three architectures, in the first on-premise model an IP-aware PBX server is installed directly on corporate LAN. Second model utilizes the modern SaaS VoIP system where management, call, and session control, all are located in public cloud. The third infrastructure combines cloud and on-premise operation management to form a hybrid cloud infrastructure.
With the changing needs of business, VoIP platforms are evolving to support business operations. A shift towards the mobile workforce, which is flexible is impacting the VoIP deployment. Enterprises are migrating their VoIP platforms to public cloud and hybrid cloud from on-premise, creating a mobile-first mindset within the IT department. As there are three models available to deploy VoIP platforms and establish a seamless communication one must analyze each one and decide according to business requirements.
Starting with on-premise architecture; it requires initial hefty investments to be made in communication servers, SBCs, and phones to deploy VoIP platform. Further, the desk and conference phones connect with VoIP communication server and register it. After establishing a communication channel over the LAN using IP, local servers are capable of managing setup, teardown, and routing. It routes the calls via SBCs that acts as a facilitator between private VoIP and public switched telephone network. On-premise system benefits mostly firms with most users working within the local LAN.
On the other hand, SaaS VoIP architecture does not require hefty investments as it resides in the public cloud as businesses pay for user license. VoIP server management and security are part of the cloud vendor, off-loading responsibilities from business administrators. As SaaS model provides enterprise level services at cheap cost and requires less in house talents; it is advisory for SMBs to utilize the same.
Earlier discussed models have own benefits but at times large businesses prefer to go for the combine approach hybrid cloud in which the server resides within the company’s LAN but can provide several cloud administration and remote operation benefits supporting mobile operations. Additionally, security in the hybrid cloud is managed by both service provider and customer bridging the gap between on-premise and SaaS model.