Cisco 3911, Administration Manual

Page: 39 / 106

2-7
Cisco Unified SIP Phone 3911 Administration Guide for Cisco Unified Communications Manager
OL-14029-01
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Understanding the Phone Startup Process
For more information on how a SIP phone interacts with the TFTP server, refer to
the
Cisco Unified Communications Manager System Guide.
SIP Dial Rules
For Cisco Unified SIP IP phones, the administrator uses dial rules to configure
SIP phone dial plans. These dial plans must be associated with a SIP phone device
to enable dial plans to be sent to the configuration file. If the administrator does
not configure a SIP phone dial plan, the phone does not display any indication of
a dial plan.
For more information on configuring SIP dial rules, refer to the Cisco Unified
Communications Manager Administration Guide .
Understanding the Phone Startup Process
When connecting to the VoIP network, the Cisco Unified IP Phone go through a
standard startup process that is described in
Table 2-3 . Depending on your
specific network configuration, some of these steps may not occur on your
Cisco Unified IP Phone.
Table 2-3 Cisco Unified IP Phone Startup Process
Step Description Related Topics
1. Obtaining Power
from the Switch
If a phone is not using external power, the
switch provides in-line power through the
Ethernet cable attached to the phone. • Adding Phones to the
Cisco Unified Com-
munications Manager
Database, page 2-9
.
•
Resolving Startup
Problems, page 7-1
.
2. Loading the Stored
Phone Image
The Cisco Unified IP Phone has non-volatile
Flash memory in which it stores firmware
images and user-defined preferences. At startup,
the phone runs a bootstrap loader that loads a
phone image stored in Flash memory. Using this
image, the phone initializes its software and
hardware. Resolving Startup
Problems, page 7-1
.