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Privacy Pioneer Promises Secure VOIP

LAS VEGASPhil Zimmermann, the celebrated cryptographer who created PGP (Pretty Good Privacy) for e-mail encryption, is taking a shot at securing VOIP communications.
Zimmermann took the stage at the Black Hat Briefings here to show off Zfone, a prototype application that encrypts voice-over-IP calls to thwart man-in-the-middle eavesdroppers.
Using the open-source, cross-platform softphone Shtoom and the Diffie-Hellman key agreement protocol, Zimmermann has developed a session-based encryption tool that lets two users on a SIP (Session Initiation Protocol)-based VOIP connection verify each other’s identity to avoid snooping.
“I don’t think I have to make the case too much as to why you need secure VOIP,” Zimmermann said in a chat with reporters after his presentation. “As we move our phone calls from the relative safety of PSTN [public switched telephone networks], we will have to deal with the weaknesses and vulnerabilities associated with the Internet.”
“Every day, I look at my server console, I see attempts to break in. It’s nonstop. As our phone calls move from the PSTNs to the Internet, not to protect those calls seems like a very bad idea,” he added.
Zimmermann is no stranger to securing voice communications. In the early 1990s, he created the PGPfone software package, which combined speech compression and cryptography protocols to secure voice calls. But the idea never took off, because, as Zimmermann explains it, “the Internet just wasn’t ready for it.”

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Voxilla Canadian Store

The newly opened online Voxilla Canada Store stocks the entire line of products and accessories that are currently offered on the Voxilla Store but are represented in Canadian currency, at prices comparable to those in the US store.
Voxilla Canada will offer free standard shipping throughout the country for its entire product line. Among the products carried by Voxilla Canada are VoIP adaptors and IP phones manufactured by Intertex, Grandstream, Leadtek, Linksys/Sipura, Polycom, SipCPE and others. Starting later this year Voxilla will also publish expanded Canada-specific content on the new Voxilla Canada web site.

SIPCPE FX200 Voip Port Converter

This is a converter to convert your PSTN phone line to your VOIP phone. It is a feature product to call forward tool between your VOIP number and your local phone number or cell phone number.

Compatible with Cisco, Grandstream and Sipura VoIP adaptors only.
For a detailed overview of the capabilities of the SIPCPE FX200, please visit
Update: the site is given up. 2009.08.03
Now you can use your VOIP service to make and receive telephone calls even when you’re out of the office, with SIP CPE Sources’ FX-200 VoIP Port Converter.
The majority of the 1 and 2 port gateways and analog terminal adapters on the market are not configured with an FXO or Line port. With the FX200, you can use “Transit In” and “Transit Out” functions with your gateway or analog terminal adaptor in conjunction with your VOIP service.

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Digital Voice Services

This is a IP phone provider based on Great Vancouver, BC Canada.
Let’s see how it works.

For my parents in Shanghai, I think it is better to buy it and send the adapter to them. Connect it to the high speed internet and plug the regualar phone set.
I can call them with (604) area code to them as a local phone call.
This is a way I will use it. Another one is I use it instead of my currently Telus phone service.
Their rate is cheaper than that of Telus.

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VoIP Technology

This is from Fierce VOIP
The foundation of VoIP networks and VoIP technology is a set of protocols called H.323. These protocols were established by the Telecommunications Sector of the International Telecommunication Union (ITU-T). H.323 specifies components, protocols, and procedures for real-time point-to-point and multipoint multimedia communication over packet-based networks. It also sets interoperability guidelines for communication between H.323-enabled networks and other conferencing standards.

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Defination of VOIP

From Vonage

Voice over Internet Protocol (VoIP) is a reliable technology for transmitting ordinary telephone calls over your internet connection using packet linked routes, also called IP Telephony . Internet Protocol involves the transmission of telephone calls over a data network like the Internet that can reach any telephone on the public-switched telephone network (PSTN).


Voice over IP (also called VoIP, IP Telephony, and Internet telephony) is the routing of voice conversations over the Internet or any other IP network. The voice data flows over a general-purpose packet-switched network, instead of the traditional dedicated, circuit-switched voice transmission lines.

From Encarta Reference

Voice Over Internet Protocol (VOIP) is a method for making telephone calls over the Internet by sending voice data in separate packets, just as e-mail is sent. Each packet is assigned a code for its destination, and the packets are then reassembled in the correct order at the receiving end. Recent technological improvements have made VOIP almost as seamless and smooth as a regular telephone call.

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