PBX systems are becoming somewhat akin to mainframes — people have been predicting their demise for some time, but they still persist. The underlying principles of telephony haven't changed, it is how they are implemented that has changed. Many businesses are interested in a comprehensive communications package — one that does more than just provide a phone on a desktop. For example, Microsoft's Lync Server is changing how we look at presence, voice, IM, and conferencing. The days of having a physical phone and the techs to support that physical phone are numbered. The PSTN (public switched telephone network or, as some refer to it, POTS - plain old telephone service) networks will gradually be replaced. A growing number of individuals and households are getting rid of land lines and are instead using their cell phones.
One interesting facet of the IT industry is the need to learn new skills on a continual basis. New technologies are released all the time, and new operating systems seem to roll off the factory floor every 18 months or so. That means that IT professionals must continuously update their skills or end up becoming redundant.
This slideshow features 10 tech skills, identified by Randy Muller, MCT, MCSE, MCSA, MCDST and Global Knowledge, as heading the way of the dinosaur.