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Deployment Scenarios
SPA9000 Voice System Administration Guide 22
1
ITSP Service, PSTN and ISDN Access and Local Voice Mail
In this scenario, the customer takes full advantage of the SPA9000 Voice System
solution. This customer has the SPA9000 IP PBX, VoIP service, one SPA400 unit for
voice mail service, and another SPA400 for PSTN access with four FXO ports. In
addition, this installation includes an ISDN Gateway for ISDN BRI access with four
BRI ports. Up to 16 IP phones can be installed. Optionally, analog phones or fax
machines (not illustrated) can be connected to the two phone ports on the
SPA9000.