Spa9000 Architecture - Linksys SPA9000 Administration Manual

SPA9000 Architecture

This section describes the basic architecture, function, and configuration options for the
SPA9000.
Application
server
FXS1 FXS2
As shown in Figure A-4, the SPA 9000 provides four logical line interfaces, referred to as Line 1,
2, 3, and 4. Each line can be configured with the same or a different ITSP. Each SPA400 also
occupies one line interface. The SPA9000 has five internal clients that register implicitly with the
internal SIP proxy:
• FXS1 (fxs1)
• FXS2 (fxs2)
• Call Park (callpark)
• Auto-Attendant (aa)
• Internal Music Server (imusic)
FXS1 and FXS2 correspond to the two physical FXS ports. The FXS ports can only register with
the local SIP proxy. The Call Park is used to maintain calls that are parked, and AA is a scriptable
auto-attendant application.
Linksys Voice System Administration Guide
Figure A-4 SPA9000 Architecture
SPA9000
Administration
Line 1
web server
Line 2
SIP Proxy
SIP Registrar
Line 3
Line 4
Media (RTP) Proxy
aa imusic
SPA9000 Architecture
(408)111-1000 to 7
ITSP SIP Proxy
(408)111-1111
SPA 400
(408)111-1112
SIP-PSTN (408)111-1113
(408)111-1114
gateway
(949)111-2000 to 7
ITSP SIP Proxy
(888)111-3000 to 7
ITSP SIP Proxy
Call
park
PSTN
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