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Server 15 Feb 2011 | 04:37 am
This section tells you how to set up the server side of things. I figured that this should go first since without a server, your client is kind of useless. Security − keeping people out Security is ...
What is a VPN? 14 Feb 2011 | 04:20 am
What is a VPN? VPN stands for Virtual Private Network. A VPN uses the Internet as it's transport mechanism, while maintaining the security of the data on the VPN. But really, what IS a VPN? There ar...
the ISDN transport 14 Feb 2011 | 04:11 am
Work on developing ISDN began in the 1970s but would not be sold to the bandwidth-hungry customer until the early to mid 1990s. Many said it was too little too late, and the consumer marke...
The POTS transport 14 Feb 2011 | 04:08 am
As you already know, POTS is a transport that runs through the circuit- switched PSTN. All transport lines in the PSTN have a circuit-identification number, which is either all numeric or alphanum...
Understanding How the PSTN Supports VoIP 14 Feb 2011 | 04:06 am
No other network in the world can compare to the reliability of the U.S. switched network. (Granted, a handful of disasters have disrupted PSTN services in specific regions, but these are the ex...
How VoIP and the Internet Fit the CSI Picture 13 Feb 2011 | 02:04 pm
To understand how the Internet relates to the five CSIs, it helps to first recog- nize what the Internet is. No doubt Bell would be captivated by the enormity of what we call the Internet. By d...
Summing up the CSIs 13 Feb 2011 | 02:01 pm
A CSI is like a highway system that lays out all the many roads that enable people to drive to their destinations. Within our highway system, we could characterize some roads as being large or wid...
The wireless CSI 13 Feb 2011 | 02:00 pm
Wireless telecommunications have been around for more than eight decades. First we had the radio in the 1920s. During World War II, we had the inception of walkie-talkies. These led to the deve...
The hybrid fiber-coaxial CSI 13 Feb 2011 | 01:58 pm
When fiber-optic cable began to be deployed widely, the cable companies started using fiber to build out their infrastructure. But by that time, much of the coaxial cable infrastructure supporti...
The optical carrier CSI 13 Feb 2011 | 02:06 am
The DS carrier service infrastructure gave us two important building blocks that were used to further extend the capacity for supporting VoIP networks. First and foremost, the DS network establishe...
