Linksys SPA9000 Administration Guide

Linksys Voice System Administration Guide 134
SPA9000 Architecture
SPA9000 Architecture
This section describes the basic architecture, function, and configuration options for the
SPA9000.
Figure A-4 SPA9000 Architecture
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.
imusic
Line 1
ITSP SIP Proxy
(408)111-1000 to 7
(949)111-2000 to 7
(888)111-3000 to 7
ITSP SIP Proxy
ITSP SIP Proxy
SPA9000
aa
PSTN
SPA 400
SIP-PSTN
gateway
(408)111-1111
(408)111-1112
(408)111-1113
(408)111-1114
Line 2
Line 3
Line 4
FXS1
Application
server
Switch
FXS2
SIP Proxy
SIP Registrar
Media (RTP) Proxy
Call
park
Administration
web server

Linksys SPA9000 Specifications

Physical Interfaces

Ethernet ports	2 10/100BaseT RJ-45
Phone ports	2 RJ-11 FXS
Ring voltage	40-55 VRMS
Ring frequency	10 Hz - 40 Hz
Maximum ringer load	3 REN

Power

On-hook voltage	-50 V NOMINAL
Off-hook current	25 mA min
Terminating impedance	Configurable, including 600 ohms