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Cisco Unified IP Phone 7960G/7940G Administration Guide for Cisco Unified Communications Manager 7.0 (SCCP)
OL-15498-01
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
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
Table 2-3. Depending on your specific network
configuration, not all of these steps may occur on your Cisco Unified IP Phone.
Ta b l e 2-3 Cisco Unified IP Phone 7960G and 7940G Startup Process
Task Description Related Topics
1. Obtain 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 Communications Manager Database,
page 2-7.
• Resolving Startup Problems, page 8-1.
2. Load 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 8-1.
3. Configure the VLAN.
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.
• Network Configuration Menu, page 4-4.
• Resolving Startup Problems, page 8-1.
4. Obtain 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.
• Network Configuration Menu, page 4-4.
• Resolving Startup Problems, page 8-1.
5. Access a TFTP server.
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.
• Network Configuration Menu, page 4-4.
• Resolving Startup Problems, page 8-1.
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.
For more information, refer to the Cisco
Unified
Communications Manager Security Guide