The quality of voice transmission is characterized by several metrics that may be monitored by network elements and by the user agent hardware or software. Such metrics include network packet loss, packet jitter, packet latency (delay), post-dial delay, and echo. The metrics are determined by VoIP performance testing and monitoring.[20][21][22][23][24][25]
On the physical side, you'll also need to plan for providing Ethernet drops to any new desktop phones you'll be placing on user desks, or even adding capacity to your Wi-Fi network should you decide to use wireless calling. For many organizations a separate network is often winds up being the preferred solution. If that's what happens in your case, you'll need a separate VoIP gateway. You'll also need security that understands voice protocols, and you'll need to have switches and routers that understand VoIP, too. By the time you've covered all those bases, a separate network is often the more effective solution rather than attempting to not only install but also integrate that much new equipment into an existing LAN.

Voice over Internet Protocol (VoIP), also called IP telephony, is a method and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. The terms Internet telephony, broadband telephony, and broadband phone service specifically refer to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN), also known as plain old telephone service (POTS).
We think that’s understandable, though, considering Vonage offers top-notch customer support to match its top-notch phone systems. All Vonage customers enjoy 24/7 customer support and IT solutions. And with Advanced Vonage plans, business owners get Orange-Glove Setup of their phone systems. And in case you’re wondering, Orange-Glove Setup = white-glove setup, but, you know . . . orange to match Vonage’s colors.
Local number portability (LNP) and mobile number portability (MNP) also impact VoIP business. In November 2007, the Federal Communications Commission in the United States released an order extending number portability obligations to interconnected VoIP providers and carriers that support VoIP providers.[33] Number portability is a service that allows a subscriber to select a new telephone carrier without requiring a new number to be issued. Typically, it is the responsibility of the former carrier to "map" the old number to the undisclosed number assigned by the new carrier. This is achieved by maintaining a database of numbers. A dialed number is initially received by the original carrier and quickly rerouted to the new carrier. Multiple porting references must be maintained even if the subscriber returns to the original carrier. The FCC mandates carrier compliance with these consumer-protection stipulations.
Step 3 is all about reviews. However, as this section is about comparison we are introducing our Ratings Comparison Tool in this section. This tool allows the ability to select from a list of service providers and compare user review ratings side by side. You can also select specific rating categories for a seletion of providers and visually compare in a graphical representation.
Back-end integration with custom and third-party apps, like CRM systems, also open a whole new world for your calling data because now it can extend the phone system beyond just basic voice communication. Such integrations allows users to transfer calls to and from their mobile phone, place and receive calls from their personal phone (that appear to be coming from the business), and interact with colleagues and customers via voice and text -- all from a variety of devices. But it also allows recording and analysis of call data to measure things like customer satisfaction, understand your sales audience at a new level, and even handle customer requests and problems automatically without the customer ever being aware they never spoke to a human.
The steps and principles involved in originating VoIP telephone calls are similar to traditional digital telephony and involve signaling, channel setup, digitization of the analog voice signals, and encoding. Instead of being transmitted over a circuit-switched network, the digital information is packetized and transmission occurs as IP packets over a packet-switched network. They transport media streams using special media delivery protocols that encode audio and video with audio codecs and video codecs. Various codecs exist that optimize the media stream based on application requirements and network bandwidth; some implementations rely on narrowband and compressed speech, while others support high-fidelity stereo codecs.
On the early ARPANET, real-time voice communication was not possible with uncompressed pulse-code modulation (PCM) digital speech packets, which had a bit rate of 64 kbps, much greater than the 2.4 kbps bandwidth of early modems. The solution to this problem was linear predictive coding (LPC), a speech coding data compression algorithm that was first proposed by Fumitada Itakura of Nagoya University and Shuzo Saito of Nippon Telegraph and Telephone (NTT) in 1966. LPC was capable of speech compression down to 2.4 kbps, leading to the first successful real-time conversation over ARPANET in 1974, between Culler-Harrison Incorporated in Goleta, California, and MIT Lincoln Laboratory in Lexington, Massachusetts.[71] LPC has since been the most widely used speech coding method.[72] Code-excited linear prediction (CELP), a type of LPC algorithm, was developed by Manfred R. Schroeder and Bishnu S. Atal in 1985.[73] LPC algorithms remain an audio coding standard in modern VoIP technology.[71]
The majority of plans are loaded with a great selection of features that can come in handy when you are making or receiving calls. Many providers offer over 30 features included in the low monthly fees. These include basic call management features such as call waiting, call forwarding, call blocking, caller ID name, do not disturb, and voicemail. More advanced features such as the voicemail to email feature let's you access your messages at anytime, even when you are away from your home, simply by checking your email inbox. Distinctive ringing, additional virtual numbers, and Smartphone Calling App's are other examples of more advanced features that can be useful.