2-9
Cisco IP Phone Administration Guide for Cisco CallManager, Cisco IP Phone 7961G/7961G-GE and 7941G/7941G-GE
OL-6966-01
Chapter 2 Preparing to Install the Cisco IP Phone on Your Network
Understanding the Phone Startup Process
Understanding the Phone Startup Process
When connecting to the VoIP network, the Cisco IP Phone 7961G/7961G-GE and
7941G/7941G-GE go through a standard startup process that is described in
Table 2-4. Depending on your specific network configuration, not all of these
steps may occur on your Cisco IP Phone.
Table 2-4 Cisco IP Phone 7961G/7961G-GE and 7941G/7941G-GE 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 CallManager
Database,
page 2-11.
• Resolving Startup
Problems,
page 9-2.
2. Loading the Stored
Phone Image
The Cisco 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 9-2.
3. Configuring VLAN If the Cisco 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 4-6.
• Resolving Startup
Problems,
page 9-2.
4. Obtaining an IP
Address
If the Cisco 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 4-6.
• Resolving Startup
Problems,
page 9-2.
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