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Cisco Unified IP Phone 7960G/7940G Administration Guide for Cisco Unified Communications Manager 7.0 (SIP)
OL-15499-01
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 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 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 7-1.
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 7-1.
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 7-1.
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 7-1.
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 7-1.
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
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