Understanding The Phone Startup Process; Adding Phones To The Cisco Unified Communications Manager Database - Cisco 7940 - IP Phone VoIP Administration Manual

Understanding the Phone Startup Process

Understanding the Phone Startup Process
When connecting to the VoIP network, the Cisco Unified IP Phone 7960G and 7940G go through a
standard startup process that is described in
configuration, not all of these steps may occur on your Cisco Unified IP Phone.
Table 2-3 Cisco Unified IP Phone 7960G and 7940G Startup Process
Task Description
Obtain power from the switch.
1.
If a phone is not using external power, the switch provides
in-line power through the Ethernet cable attached to the
phone.
Load the stored phone image.
2.
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.
Configure the VLAN.
3.
If the Cisco Unified IP Phone is connected to a
Cisco Catalyst switch, the switch next informs the phone of
the voice VLAN defined on the switch. The phone needs to
know its VLAN membership before it can proceed with the
Dynamic Host Configuration Protocol (DHCP) request for
an IP address.
Obtain an IP address.
4.
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.
Access a TFTP server.
5.
In addition to assigning an IP address, the DHCP server
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.
Note You can also assign an alternative TFTP server to
use instead of the one assigned by DHCP.
6. Request the CTL file.
The TFTP server stores the certificate trust list (CTL) file.
This file contains a list of Cisco Unified Communications
Managers and TFTP servers that the phone is authorized to
connect to. It also contains the certificates necessary for
establishing a secure connection between the phone and
Cisco Unified Communications Manager.
Cisco Unified IP Phone 7960G/7940G Administration Guide for Cisco Unified Communications Manager 7.0 (SCCP)
2-6
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Table 2-3. Depending on your specific network
Related Topics
Adding Phones to the Cisco
•
Unified Communications Manager Database,
page 2-7.
Resolving Startup Problems, page
•
Resolving Startup Problems, page
Network Configuration Menu, page
•
Resolving Startup Problems, page
•
Network Configuration Menu, page
•
Resolving Startup Problems, page
•
Network Configuration Menu, page
•
Resolving Startup Problems, page
•
For more information, refer to the Cisco
Unified Communications Manager Security Guide
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