VoIP solutions have emerged as a natural substitute for PSTN phone services, wherein users can make calls to faraway locales at half the cost. However, such services have to be delivered over secured and controlled networks to ensure that the call quality is optimum. The importance of Session Initiation Protocol and solutions pertaining to the same can be understood in this context.

VoIP telephone calls are often made from a computer. The use of facilitating software and headsets make these calls all the more interesting. However, the important point that needs to be noted in this context is that VoIP solutions and services can be offered through either of the two protocols \u2013 the Session Initiation Protocol and the H.323 protocol. Each of these two standards have their own set of merits. One is more applicable in certain contexts while the other is the preferred choice in certain others.

SIP or Session Initiation Protocol is of immense use to enterprises as well as small and medium organisations; a adherence to this standard facilitates the process of call termination to different geographical destinations. With interesting applications such as call conferencing and messaging in internet telephone calls, SIP is definitely making an impact on the way people communicate in the modern day world.

Due to the emergence of these solutions, the complete monopoly that traditional phone companies were enjoying earlier are now a thing of the past. There are quite a few merits for using SIP enabled VoIP services.

1.Cost efficiency: there is significant reduction in call costs.
2.Flexibility: the phones can be carried from one place to another without any problem.
3.QoS issues: the call quality is impressive, and the time lags between conversation is minimal.

Moreover, the SIP solutions become invaluable in the local loop networks. This is because of the fact that the requirements pertaining to NAT and firewalls can be easily achieved with these solutions. Moreover, this protocol pertaining to Voice over IP ensures that bandwidth is being used optimally. With the standards followed in data compression, considerable savings in bandwidth is possible.

These services and solutions are proving to be very much popular among the individual users; many of them are showing their preference for bundled services, wherein SIP-based solutions are an integral part. Consequently, many leading providers of VoIP services and solutions are designing and developing telephony solutions that are based on the Sessions Initiation Protocol. With high speed data transfer, seamless integration and the availability of some of the best value-added applications, the SIP solutions are proving their mettle in more ways than one.

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