
Chapter 1 Using the Linksys Voice System
The Linksys Voice System
Figure 1-1 The Linksys Voice System (LVS) with the SPA9000 and SPA400
PSTN
Up to 4 FXO lines
Local voicemail
SPA400
SIP-PSTN gateway
Switch
SPA901, 921, 922, 941, 942, 962
FXS1
Fax/Analog
Phones
ISP
SPA9000
IP PBX
FXS2
Internet
ITSP
The LVS 9000 system uses the power of VoIP to provide
With the optional SPA400, the SPA9000 can also manage calls to and from the PSTN. The SPA9000 also includes an Analog Telephone Adapter (ATA), with two FXS ports for connecting analog telephones, fax devices, or an external music source for the music
The SPA9000 supports four independent line interfaces with numbers assigned by one to four different ITSPs, with each line supporting up to 16 extensions. If the service provider supplies a group of sequential direct inward dial (DID) phone numbers (such as
For information about LVS architecture, refer to the “SPA9000 Architecture” section on page
SPA400 SIP-PSTN Gateway and Voicemail
The SPA400 is optionally used with the SPA9000 to provide a
Note The SPA400 provides four FXO ports and occupies one line interface on the SPA9000.
A total of four SPA400 devices can be configured per SPA9000, using up to 16 analog phone lines and, with the SPA9000, automatically routing calls to and from your existing PSTN telephone service.
| Linksys SPA9000 Administrator Guide |
Document Version 3.01 |