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 a standard startup process, as described in Table
Table
| Process Step | Description | Related Topics | ||
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| 1. Obtaining Power | If a phone is not using external power, the switch | See the “Providing | ||
| from the Switch | provides | Power to the Phone” | ||
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| attached to the phone. | section on page | ||
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| See the “Resolving | ||
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| Startup Problems” | ||
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| 2. Loading the Stored | The Cisco Unified IP Phone has | See the “Resolving | ||
| Phone Image | memory in which it stores firmware images and | Startup Problems” | ||
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| section on page | |||
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| runs a bootstrap loader that loads a phone image |
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| stored in Flash memory. Using this image, the |
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| phone initializes its software and hardware. |
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| 3. Configuring VLAN | If the Cisco Unified IP Phone is connected to a | See the “Network | ||
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| Cisco switch, the switch next informs the phone of | Configuration Menu” | ||
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| the voice VLAN defined on the switch port. The | section on page | ||
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| phone needs to know its VLAN membership | See the “Resolving | ||
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| before it can proceed with the Dynamic Host | |||
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| Startup Problems” | |||
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| Configuration Protocol (DHCP) request for an IP | |||
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| address. |
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| 4. Obtaining an IP | If the Cisco Unified IP Phone is using DHCP to | See the “Network | ||
| Address | obtain an IP address, the phone queries the DHCP | Configuration Menu” | ||
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| server to obtain one. If you are not using DHCP in | section on page | ||
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| your network, you must assign static IP addresses | See the “Resolving | ||
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| to each phone locally. | Startup Problems” | ||
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| Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SCCP), Cisco Unified IP Phones |
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