Developed for small businesses, the Cisco® SPA8800 IP Telephony Gateway (Figure 1) adapts to the needs of businesses that maintain their own on-premise IP private branch exchange (PBX) or that want to add voice over IP (VoIP) to their legacy time-division multiplexing (TDM) PBX or key system. The SPA8800 can be configured to be a FXO gateway for an Asterisk open source PBX, providing a versatile solution when conditions favor an external device. Powered by industry-leading VoIP technology from Cisco, the SPA8800 is designed with a solid hardware casing and contains many standard features, including four RJ-11 FXS and four FXO ports, a 10/100BASE-T RJ-45 Ethernet interface to connect to either a router or multilayer switch, and an auxiliary port for local administration.Increase in FXO port density to connect PSTN linesAdds VoIP to a legacy TDM PBX or key systemConverts voice traffic into data packets for transmission over an IP networkSupports SIP standards for voice and data networking, for reliable voice and fax operationIncludes highly secure, encryption-based methods for communicating, provisioning, and servicing
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