Qos Voip

Security, Stability, and Interoperability on VoIP Implementation

Now we have accepted that VoIP is no longer just a phone service is here http://vonagevoipcalls.blogspot.com

it has become feature rich as it merges with computer configurations. The existence of VoIP has changed considerably in recent years, coupled with the availability of broadband Internet connection, plus leaps in multimedia technology in which virtual operations with remote sites becomes more enhanced, makes VoIP service a viable alternative to traditional communication offerings.

Cost savings is not the only driving force for VoIP implementations, enterprises must consider some aspects of business that VoIP can provide. VoIP creates potentials for applications that may not have been done before. Collaboration, integration and interactivity between employees and applications are one of several business benefits that companies can derive from VoIP adoption. Nevertheless, amid euphoria of VoIP technology, there are three important aspects to consider before a company goes VoIP. In the paragraphs that follow, I will summarize the aspect of security, stability and interoperability that play a key role in the successful implementation of VoIP.

1. Security

VoIP implementations may expose new security risks and challenges that somehow become greater concern than the quality and profitability among suppliers and users. VoIP networks are vulnerable to all the security risks as traditional IP data networks, including:

Denial of Service (DoS), viruses, worms,
Without the fraud and unauthorized access,
Spoofing, and port scanning.

It is recommended that organizations should adopt a layer security strategy and defense in depth for addressing the growing proliferation of new Internet-borne attacks and malicious activities in recent years. In this architecture, the network is segmented into secure zones protected by layers of firewall, intrusion prevention, and other security services. This strategy enables organizations to logically split and secure voice and data networks in front of the individual components of voice and data between interactive points in the network.

2. Stability

A key issue of VoIP is the amount of bandwidth required for each call. There must be adequate bandwidth reserved and the quality of the link must be well maintained throughout each call to ensure that users are not affected. As the nature of the VoIP call in real time, any disruption during the call may be easily visible and unacceptable. The two issues that enterprises usually have to face is the bandwidth and quality of service (QoS).

VoIP calls need a transmission speed of 64 kbit / s to produce the quality of voice comparable to that of a normal phone call. This channel of 64kb / s must remain open and unaffected for the duration of the call. Theoretically, VoIP installations would not allow such a huge bandwidth to be allocated for VoIP alone. Therefore, there must be a compression taking place to compact the voice data in a considerable amount before it is transmitted over a packet switched network. G.723 codec that is incorporated in VoIP standard protocol H.232 can take a stream of 64 kbit / s data and overwrite it with a mere 5.5kb / s or more. Generally, for VoIP to work reliably over WAN links, it must be low jitter, low packet loss, high-speed considerably between the ends, and within 200 ms of delay.

3. Interoperability

Compatibility between equipment from different VoIP providers is very important to stimulate the use of.