Linksys SPA921 - Cisco - IP Phone Installation And Configuration Manual page 22

Getting Started
Introducing Components of the SPA9000 Voice System
SPA9000 Voice System Installation and Configuration Guide for Setup Wizard
SPA400 Back Panel
Port
USB
ETHERNET
LINE 1, 2, 3, 4
RESET
POWER
Description/Notes
Use this port for the USB voice mail module, which
contains the voice mail prompts and provides the
storage location for saving voice mailbox messages.
Use this port to connect to the Local Area Network
(LAN) for communications with SPA9000.
These FXO ports are used to connect to an analog
phone lines.
This button is used to reset the device.
Use this port to connect to the external Power adapter
(PA100).
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