Linksys SPA-841 Cisco SPA9000 Voice System Administration Guide - Page 173

Advanced Topics in SPA9000 Administration SPA9000 Architecture A Architectural Component SIP proxy and Registrar server Media proxy server Configuration server Application server Internal music source Administration web server ATA with 2 FXS ports Call park Auto-Attendant Function Accepts registration from client stations and proxies SIP messages. Proxies RTP packets between client stations and proxies SIP messages. Serves configuration files to client stations and auto configures un-provisioned client stations. Supports advanced features such as call park/pickup, directory, directed call pickup and group paging, hunt groups, and shared line appearances. Streams audio files to client stations (both on-net and off-net). The FXS1 and FXS2 can optionally be connected to an external music source to act as a streaming audio server (SAS). When working in this mode, each FXS port can handle up to 10 concurrent calls. Allows configuration and monitoring of the SPA9000. Each FXS port can be connected to analog phones, fax machine, or an external music source. Each port can support up to two calls simultaneously. The FXS ports can only register to the internal proxy server. The call park is used to maintain calls that are parked and can handle up to 10 calls simultaneously AA is a scriptable auto-attendant application that can handle up to 10 calls simultaneously SPA9000 Voice System Administration Guide 171