Diary of Wednesday, 23st February 2005

Prepared by: ing. Jared Baraza

The last days were very cold, at least for people who lives in cities where the lowest temperature is about 15 celsius degrees... but not zero!! Or less!!!. Our day started at the conference room with a speech given by Ermanno Pietrosemoli about Site Survey and Antenna Mounting considerations, it had many important considerations about wireless field work, for example what do we need to deploy a wireless link, where do we have to install the antenna, could be on a tower or maybe on a mechanical device to put on the roof, another thing was that the place where must be the antenna have to perform enough coverage for our link, for both, the base station and the subscriber. After all these considerations and many more, all of them very important, we proceed with the break.

After the break started the presentation of Rob Flickenger about Real-world Community Network Installations, where we could see how a group of people with good ideas and effort can provide quick solutions for develop wireless links, some simple solutions as use a mail box to convert a indoor device in a outdoor device, and deploy links to provide wireless telecommunications to rural communities. After this presentation came the presentation about the issue that many of us were expecting ... VoIP. Steve Okay and Thomas Krag gave us a very interesting overview about Voice Over IP. They cover What is VoIP? How does it works? Protocols and many more stuff related. It was very interesting because at the end many of us were talking about many ways to use this technology in our countries. Then the participants enjoyed one more time the good food of the cafeteria and talking each other about our countries and jobs.

The laboratory work started at 2:00 pm about the issue we listened in the morning VOIP. The work consisted in deploy a VOIP network, using two AP Linkys, two ATA devices, two regular telephones and Steve's computer as a SIP server (VOIP server). Using the computer we had to configure first all the devices, in Linux of course. At the end we could see how this network works but using IP cellphones. It was a very interesting day.

David Espinoza Aguilar
Electronic Engineer
Peru