Cisco Wireless Ip Phone 8821 And 8821-Ex Administration Guide For Cisco Unified Communications Manager - Cisco 8821 Administration Manual

Wireless ip phone

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Manual (202 pages)

User manual (116 pages)

Accessory manual (30 pages)

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Table of Contents

Your Phone

Table 1: Battery Life

Call State

On Call

Idle

Follow these best practices to ensure that the phone conserves battery power.

User Actions

Remind your users that the battery life is reduced when the phone is turned on. Calls, messages, application

use, Bluetooth use, and actions like menu navigation use power.

Users should ensure that the phone remains in a good RF coverage area and that the phone can maintain a

constant connection to the Cisco Unified Communications Manager. If the phone moves out of range and

remains out of range for a significant time, battery life can be reduced.

For more information about RF coverage, see

19.

Phone Configuration

Configure the Scan mode field in Cisco Unified Communications Manager to suit your enterprise. The phone

supports Continuous, Auto, and Single AP scanning, where Continuous is the default. The configured scan

mode determines the battery life baseline.

• Continuous scan mode is designed for phone users that are constantly on the move and for whom frequent

roaming events occur. This mode maximizes performance and connectivity, but at the expense of battery

power.

• Auto scan mode is designed for phone users that only roam occasionally, and whoe require more idle

battery life than Continuous scan mode can offer.

• Single AP scan mode is designed for phone users that do not roam and require maximum idle battery

life.

Access Point Configuration

• For optimal idle battery life, we recommend that you use an access point that supports the Cisco

Compatible Extensions (CCX) Proxy ARP feature. CCX Proxy ARP allows the phone to remain in

suspend mode longer instead of waking up at each DTIM period. This reduces power consumption.

The Cisco Lightweight Access Points and Cisco Autonomous Access Points support CCX Proxy ARP,

but Cisco Meraki Access Points do not.

For Cisco Lightweight Access Points, CCX Proxy ARP is enabled by default and nonconfigurable. For

Cisco Autonomous Access Points, CCX Proxy ARP is disabled by default, but can be enabled with the

dot11 arp-cache optional command.

Scan Mode

Continuous

Auto

Continuous

Auto