We almost never have to worry about our phone lines becoming congested. Or rather, when we talk about congestion in the PSTN system we’re referring to the availability or the unavailability of a given route. Once a connection is obtained however, the telephone system works flawlessly. No matter how high the traffic is on other [...]
Those who’re interacting with the VoIP field will come across terms such as “narrowband” and “wideband” all the time when discussing audio quality. It’s important for them to understand that there are two interpretations of these terms. In the first, it relates to the field of digital signal processing or DSP. Wideband indicates that the [...]
We already know that NAT traversal of VoIP traffic can be problematic. The fact that internal addresses and ports are mapped to external ones make it very difficult for a peer to peer application like VoIP to connect solely on the basis of the SIP protocol which tries to negotiate the addresses and ports over [...]
Because of the large number of SIP providers and SIP clients available along with the great variance in the type of networks that people use, there are a potentially infinite number of combinations of parameters which will work with a given VoIP set up. The variables will be determined by the specific VoIP provider, the [...]
It’s important to remember that VoIP isn’t standardized the world over. Even those providers using the SIP protocol are not always in agreement as to what configurations and parameters must be used. A great deal depends on the capabilities of the hardware used to handle the VoIP transactions as well as the personal preferences of [...]
There are as many ways to use VoIP as there are techniques to access the Internet. Depending on the situation and place, you can choose that method of communication which suits you best. This is one of the great benefits of an Internet-based technology like VoIP compared to the traditional PSTN network which offers you [...]
There are some features about Internet access which are absolutely puzzling. Puzzling not merely because they seem so ridiculous when viewed dispassionately, but also because people seem to accept these restrictions without thinking twice. A lot of it seems to have to do with the mindset. People are not used to viewing their Internet access [...]
With VoIP becoming a bigger part of everyone’s communications, it’s important to pay attention to the security aspects. So far VoIP security hasn’t been at the top of the mind for many users, but that’s about to change. According to several reports by security heavyweights such as Cisco, attacks on VoIP systems have grown exponentially [...]
Plenty of small and medium-sized businesses these days have offices spread around the country. While not all nodes are equally important and many are just placeholders, communication between the centers is critical. Many organizations will have separate marketing departments in important areas in order to take advantage of the local conditions. In today’s fast-paced environment, [...]
Imagine two scenarios. In the first, a friend of yours is giving you his or her telephone number. Unfortunately, you don’t have a piece of paper to write it down on. Neither do you have your trusty smart phone at hand. We all know that telephone numbers are notoriously difficult to remember. After all, what’s [...]