There are many VoIP books which you can find and read some for free online. Among the popular ones are listed below...
VoIP Books Title and By/Author
by Timothy V. Kelly. Read VoIP for dummies below to read the e-book or pdf version online for free.
by Theodore. Visit Switching to VoIP link to read the e-book or pdf version online for free.
- VoIP Telephony with Asterisk by Paul Mahler
- IP Telephony: The Integration of Robust VolP Services by Bill Douskalis
- Cut the Cord! The Consumer's Guide to VoIP by Jerri L. Ledford
- Voice over Internet Protocol (VoIP) Security by John Rittinghouse
- How to Do Everything with Voip, by Steven Shepard
- Fire the Phone Company, a Handy Guide to Voice Over IP by David Field
Related Articles...You May Be Interested In:
Switching to VoIP
External related link/s and resource/s:
VoIP Books on Voip-info.org
VoIP Books on IPtelephony.org
VoIP Books on Goodreads.com