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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 goes through
astandard startup process composed of the steps described in Table
Table
Step | Configuration | Related Topics | |
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1. Obtaining Power | You can connect the Cisco Unified IP Phone to a | • | Understanding the |
from the Switch | Cisco Catalyst switch with one of the modules that |
| Phone Startup |
| provides power to the phone |
| Process, page |
| See the “Providing Power to the Cisco Unified IP | • | Providing Power to |
| Phone” section on page | ||
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| the Cisco Unified | |
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| If you use this optional configuration, the phone |
| IP Phone, page |
| receives phantom power and powers up when you | • | Resolving Startup |
| connect the Cisco Unified IP Phone to the switch. | ||
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| Problems, page | |
| The phone then sends Cisco Discovery Protocol |
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| (CDP) notifications to the switch indicating that it |
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| is ready to receive CDP packets and indicating the |
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| power requirement for the phone. The switch |
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| allocates power and sends it over the network |
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| cable. |
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2. Loading the Stored | The Cisco Unified IP Phone has | • | Understanding the |
Phone Image | memory in which it stores firmware images and |
| Phone Startup |
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| Process, page | |
| runs a bootstrap loader that loads a phone image | • | Resolving Startup |
| stored in Flash memory. Using this image, the | ||
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| Problems, page | |
| phone initializes its software and hardware. |
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| Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SIP), Cisco Unified IP Phones | |
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