Cisco Systems routers running certain telephony features could be vulnerable to denial-of-service attacks, the company warned Friday. Cisco said routers running the IOS Telephony Service, Cisco ...

For the first few years of the so-called IP PBX market, Cisco quickly became the market-share leader and the telecom CPE crowd sort of collectively shrugged and said, “well, whadya expect?” There was ...

Cisco System Inc.’s update to its CallManager IP PBX — introduced this week with native SIP support — will require broader upgrades to other network ...

Cisco Systems on Thursday introduced less-expensive versions of its Internet phone software and services, as the company broadens its push into the small-business market. One of the new products, ...