Need additional assistance analyzing your VoIP problems? Try VoIPtroubleshooter.com. There are online diagnostic tools, speech samples, a VoIP troubleshooting forum, standards links, in-depth discussions on technical issues like jitter and packet loss concealment, and more. One of the gems is the free Telchemy IP Network Impairment Simulator.
Pay the big bucks for a VoIP security report? Nope. Fellow blogger Russell Shaw explains and provides the link for a term paper straight from a recent library archive. For more on VoIP security topics, VOIPSA is worth a look.
Concerned about your Cisco switch having enough Power over Ethernet (PoE/802.3af) for your VoIP phones, access points, and coffee warmer? Use this nifty switch power requirement and PoE calculator.
Looking for a VoIP-specific protocol poster? Get it direct here.
Still not enough? Check out the all things VoIP Wiki, search for VoIP in blogs, news, or equipment. Try blogdigger, icerocket, or technorati as alternatives to Google. You can even limit your search for VoIP books that provide at least some free online content.