Cisco Systems SPA9000 manual Architectural Component Function

Advanced Topics in SPA9000 Administration

SPA9000 Architecture

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Architectural Component	Function
SIP proxy and Registrar server	Accepts registration from client stations
	and proxies SIP messages.
Media proxy server	Proxies RTP packets between client
	stations and proxies SIP messages.
Configuration server	Serves configuration files to client stations
	and auto configures un-provisioned client
	stations.
Application server	Supports advanced features such as call
	park/pickup, directory, directed call pickup
	and group paging, hunt groups, and shared
	line appearances.
Internal music source	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.
Administration web server	Allows configuration and monitoring of the
	SPA9000.
ATA with 2 FXS ports	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.
Call park	The call park is used to maintain calls that
	are parked and can handle up to 10 calls
	simultaneously
Auto-Attendant	AA is a scriptable auto-attendant
	application that can handle up to 10 calls
	simultaneously

SPA9000 Voice System Administration Guide 171