Cisco Systems manual Advanced Topics in SPA9000 Administration, Technology Background

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Advanced Topics in SPA9000 Administration

This appendix provides more detailed technical information for administrators who want to understand how the SPA9000 Voice System works.

•“Technology Background,” on page165

•“SPA9000 Architecture,” on page170

•“SIP-NAT Interoperation,” on page172

•“Advanced Call Control and Routing,” on page173

•“Configuring Vertical (Supplementary) Service Codes,” on page173

•“Advanced Topics for SPA400 Voice Mail Service,” on page178

•“Remote Provisioning Features,” on page183

Technology Background

This section provides background information about the technology and protocols used by the SPA9000 system. It includes the following topics:

•“Session Initiation Protocol,” on page166

•“SPA9000 Media Proxy,” on page167

•“Using the SPA9000 with a Firewall or Router,” on page168

•“SPA400 SIP-PSTN Gateway,” on page169

SPA9000 Voice System Administration Guide 165