Cisco Systems OL-8131-01 manual Power Outage, Power Source Design

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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network

Providing Power to the Cisco Unified IP Phone

Power Source Design, page 2-10

Redundancy Feature, page 2-11

Installing the Cisco Unified IP Phone, page 3-6

Power Outage

Your accessibility to emergency service through the phone is dependent on the phone being powered. If there is an interruption in the power supply, Service and Emergency Calling Service dialing will not function until power is restored. In the case of a power failure or disruption, you may need to reset or reconfigure equipment before using the Service or Emergency Calling Service dialing.

Power Source Design

The phone and switch automatically determine which power source the phone uses. If the power has to be switched to a different source, the phone user will experience different results based on which power source is being used by the phone.

Use the following information to choose a power source for the phone:

If you plug a phone into the optional power supply before plugging it into the network, the phone is powered by the power supply.

If you then unplug the phone from the power supply, the phone resets. If the switch port is configured for 10/100 Mbps, the switch recognizes the loss of power and brings the phone back up.

If the switch port is configured for 10 Mbps only, then you must unplug the network connection and plug it back into the phone for the switch to recognize the phone’s loss of power.

If, however, you plugged the network connection into the phone before you plugged in the power cord, the phone receives power through the switch, and unplugging the power cord will not bring down the phone. If the switch reboots, the phone will then be powered by the power cord.

 

 

Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SIP), Cisco Unified IP Phones

 

 

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OL-8131-01

 

 

 

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Contents Preparing to Install Cisco Unified IP Phone on Your Network Configuring Telephony Features Related TopicRelated Topics Step Configuration Related Topics Understanding the Phone Startup ProcessStep Configuration Related Topics Step Configuration Related Topics Phone Understanding Phone Configuration Files and Profile Files Providing Power to the Cisco Unified IP Phone Power Outage Power Source DesignRedundancy Feature ProcedureAdding Phones to the Cisco Unified CallManager Database Determining the MAC Address of a Cisco Unified IP PhoneCisco Unified IP Phone Method Reference Adding Phones with Auto-Registration Requires MAC Method Address?Adding Phones with Cisco Unified CallManager Administration Creating a SIP Profile Adding Phones with BATClick Save Using Cisco Unified IP Phones with Different Protocols Converting a New Phone from Sccp to SIP Converting an In-Use Phone from Sccp to SIPConverting an In-Use Phone from SIP to Sccp Deploying a Phone in an Sccp and SIP EnvironmentOL-8131-01