Linksys SPA921 Cisco SPA9000 Voice System Administration Guide - Page 23
ITSP Service, PSTN Access and Local Voice Mail, deployed with the SPA9000 IP PBX
UPC - 745883570799
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Getting Started Deployment Scenarios 1 ITSP Service, PSTN Access and Local Voice Mail In this scenario, the customer wants to use ITSP service for reduced long distance fees but needs to support legacy local telephone numbers (for example, to receive calls to a legacy telephone number or to place outbound calls in the local area). This customer also prefers local voice mail service. The SPA9000 Voice System is deployed with the SPA9000 IP PBX, VoIP service, one SPA400 unit for voice mail service, and another SPA400 unit for PSTN access with four FXO 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. SPA9000 Voice System Administration Guide 21