X80 series ability to scale up to 200 devices and to support standards-based protocols, including Session Initiation Protocol (SIP), provide invest protect for enterprises for current and future telecom needs. With a built-in flexible and optional gateway interface, the platform can connect up to 1-4/8 analog loop-start central office (CO) lines or 1E1 digital interface cables directly to PSTN, reducing configuration time and its related expense.