Understanding The Phone Startup Process - Cisco 7931G Administration Manual

Understanding the Phone Startup Process

The filenames are derived from the MAC Address and Description fields in the Phone Configuration
window of Cisco Unified Communications Manager. The MAC address uniquely identifies the phone.
For more information, see the
For more information about how the phone interacts with the TFTP server, see the Cisco Unified
Communications Manager System Guide,

Understanding the Phone Startup Process

When connecting to the VoIP network, the Cisco Unified IP Phone goes through a standard startup
process, as described in
steps may occur on your Cisco Unified IP Phone.
Table 2-3 Cisco Unified IP Phone Startup Process
No. Process
1. Obtaining Power from the
Switch.
2. Loading the Stored
Phone Image.
3. Configuring VLAN.
4. Obtaining an IP Address.
5. Accessing a TFTP Server. In addition to assigning an IP address, the DHCP server
6. Requesting the CTL file.
Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP and SIP)
2-6
Cisco Unified Communications Manager Administration
Table 2-3. Depending on your network configuration, not all of these process
Description
If a phone is not using external power, the switch
provides in-line power through the Ethernet cable that is
attached to the phone.
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.
If the Cisco Unified IP Phone is connected to a Cisco
switch, the switch next informs the phone of the voice
VLAN defined on the switch port. The phone needs to
know its VLAN membership before it can proceed with
the DHCP request for an IP address.
If the Cisco Unified IP Phone is using DHCP to obtain an
IP address, the phone queries the DHCP server to obtain
one. If you are not using DHCP in your network, you
must assign static IP addresses to each phone locally.
directs the Cisco Unified IP Phone to a TFTP Server. If
the phone has a statically defined IP address, you must
configure the TFTP server locally on the phone; the
phone then contacts the TFTP server directly.
You can also assign an alternative TFTP server
Note
to use instead of the one assigned by DHCP.
The TFTP server stores the CTL file. This file also
contains the certificates necessary for establishing a
secure connection between the phone and Cisco
Unified Communications Manager.
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Cisco TFTP.
Guide.
Related Topics
See Providing Power to the
Phone, page 2-3.
See Resolving Startup Problems,
page 9-1.
See Resolving Startup Problems,
page 9-1.
See Network Configuration
Menu, page 4-6.
See Resolving Startup Problems,
page 9-1.
See Network Configuration
Menu, page 4-6.
See Resolving Startup Problems,
page 9-1.
See Network Configuration
Menu, page 4-6.
See Resolving Startup Problems,
page 9-1.
See the Cisco Unified
Communications Manager
Security Guide, Configuring the
Cisco CTL Client.
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