Switching to VoIP
Product Description
More and more businesses today have their receive phone service through Internet instead of local phone company lines. Many businesses are also using their internal local and wide-area network infrastructure to replace legacy enterprise telephone networks. This migration to a single network carrying voice and data is called convergence, and it’s revolutionizing the world of telecommunications by slashing costs and empowering users. The technology of families driving this convergence is called VoIP, or Voice over IP. VoIP has advanced Internet-based telephony to a viable solution, piquing the interest of companies small and large. The primary reason for migrating to VoIP is cost, as it equalizes the costs of long distance calls, local calls, and e-mails to fractions of a penny per use. But the real enterprise turn-on is how VoIP empowers businesses to mold and customize telecom and datacom solutions using a single, cohesive networking platform. These busine… More >>
December 15th, 2009 at 12:43 am
I signed up for PHONE POWER on a promotion for 10 a month or something. I paid $44 to send the adapter. I never got the damned thing to work and they were NO HELP. They were surly and rude — totally condescending! After the promo I sent their adapter back after the promo ended, for another $8 or soI then got an email from them saying that they didn’t get the power plug for the damned thing and billed me another $99.99!!! I know I sent the thing in, I put it together, left it, put it back in the box and sent it back. I don’t have the thing in my house! SO I PAID $44 + $8 + $99.99 = $151.99 for no phone service.
If you want to spend $151.99 for no service, use PHONE POWER. If you value your dollar, stay far away from them.
Rating: 1 / 5
December 15th, 2009 at 12:47 am
This book provides a comprehensive look at not only VoIP, but all related legacy telephony systems it may interact with or replace. A wonderful resource for anyone considering a VoIP deployment either at the office or at home. The technical detail and background the author provides in his examples and background information is incredibly helpful. I definately recommend..
Rating: 5 / 5
December 15th, 2009 at 1:49 am
Since I’m starting with a knowledge base of zero there is a lot of good information in this book. For technical information it is realtively easy to read. Information may be dated at this point, I won’t know till I catch-up.
Rating: 3 / 5
December 15th, 2009 at 2:24 am
I enjoyed this book a lot and also read Cisco Press’s “Taking Charge of Your VoIP Project” by Walker and Hicks.
Here’s my frame of reference on reading and reviewing this book. I am a sys admin at a 75-person company, and I am generalist (Windows servers and desktops, LAN/WAN/wireless, switches/routers/firewalls, VPN, security, training, helpdesk, and phones). This book was targeted at someone like me, who has a networking background but little phone background. We have a full-featured TeleVantage phone system that runs on a Windows server with a 24-channel T1 line to the phone company. I know enough about it to run our phone system, but I don’t know much about the underlying telephone technology.
I am considering upgrading to VoIP, because my PCI phone cards (T1 card and telephone station cards) in my phone server are old and no longer supported by new versions of TeleVantage. However, TeleVantage supports VoIP, so all I would have to do is remove the PCI cards and instead use my WAN connection to the outside world and my LAN as my connection to my phones.
This book does a good job explaining traditional telephone technology and then VoIP. The author wrote the open-source VoIP software called Asterisk, so he can speak authoritatively to VoIP. If you are so inclined, you can follow his labs (Projects) throughout the books and build your own VoIP system on Linux and Asterisk. I felt the book had the right level of technical depth for someone of my background.
I thought he also does a good job making a project of moving to VoIP very practical in a business setting. He covers things like current infrastructure assessment, design, doing a migration in chunks, how to minimize user impact, selecting a VAR (value added reseller) and measuring up-front cost and ROI.
Finally, I appreciated his objective perspective on the public telephone network and PBX vs. VoIP, that both have their advantages and disadvantages, and that while implementing and supporting VoIP can be complex, it can be achieved successfully if be done correctly.
My take-away is that I gained a general understanding of how the public phone system works from the point of view of my business, and I now generally understand how VoIP works. I can now speak somewhat intelligently and generally ask the right questions of my TeleVantage software provider and when selecting a SIP provider.
Am I comfortable starting my VoIP migration project based on these two books? Yes. I still have a lot to learn and will make some mistakes, but at least I understand generally where to start and how to proceed.
Rating: 5 / 5
December 15th, 2009 at 2:39 am
provided me a smooth introduction to the various components that make up a VoIP network…the projects at the end of the chapters were very good to guide you through the domain.
Rating: 5 / 5