San Francisco-based-CallTower, a recent spin-off from Networld Communications, is a solution provider that's selling IP telephony as a service. The start-up hopes to hit the sweet spot of SMBs and ...

The terms "IP telephony" and "voice over IP" (VoIP) are synonymous. However, the term VoIP is widely used for the actual services offered (see VoIP for details), while IP telephony often refers to ...

CallTower, based here, is offering SMBs hosted IP telephony in bundled packages priced on a per-seat, per-month basis, said Rob Bolt, senior vice president of marketing for the service provider.