A lot of what I've seen at Fall Von is best described as under-the-hood stuff.
But let us not dismiss under-the-hood. In many cases, these are tools that help keep the VoIP services engines calibrated.
For instance, I was briefed on TelcoBridges Toolpack API, a suite of C++ tools that enable VoIP carriers to develop such telephony applications and features as transparent SIP, SS7 and ISDN call bridging, Interactive Voice Response, ringback tones, call routing, voice mail, etc.
Toolpack is certainly not the sole player in this market, but TelcoBridges does stake a claim to being a solution that accelerates the time from development to deployment from several weeks to a couple of days.
If you are a carrier rushing to enable these features within your VoIP services offering, than you are the type of customer TeleBridges is interested in talking to.