Cisco Cisco IP Phone 8841 Designanleitung
Cisco Wireless IP Phone 8821 and 8821-EX Wireless LAN Deployment Guide
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It is recommended to utilize an access point that supports the Cisco Compatible Extensions (CCX) Dynamic Transmit Power
Control (DTPC) feature. When DTPC is enabled, the access point will advertise its transmit power to all clients, where the
Cisco Wireless IP Phone 8821 and 8821-EX can then adjust its transmit power to a minimum level that is only necessary to
communicate with the connected access point, therefore also reducing unnecessary noise in other areas.
Multicast
Control (DTPC) feature. When DTPC is enabled, the access point will advertise its transmit power to all clients, where the
Cisco Wireless IP Phone 8821 and 8821-EX can then adjust its transmit power to a minimum level that is only necessary to
communicate with the connected access point, therefore also reducing unnecessary noise in other areas.
Multicast
If the Cisco Wireless IP Phone 8821 or 8821-EX subscribes to a multicast stream, then the Cisco Wireless IP Phone 8821 or
8821-EX must wake up at each DTIM period to receive the multicast frames, therefore power consumption is increased.
Power Save Protocol
The access point must support U-APSD, which is the power save protocol that will be utilized when on call and when in idle.
8821-EX must wake up at each DTIM period to receive the multicast frames, therefore power consumption is increased.
Power Save Protocol
The access point must support U-APSD, which is the power save protocol that will be utilized when on call and when in idle.
On Call Power Save in the Wi-Fi Profile should remain Enabled so the Cisco Wireless IP Phone 8821 and 8821-EX can
utilize U-APSD.
If On Call Power Save is Disabled, then the Cisco Wireless IP Phone 8821 and 8821-EX will utilize active mode when on call,
but still use U-APSD when in idle.
Only disable On Call Power Save for troubleshooting purposes.
utilize U-APSD.
If On Call Power Save is Disabled, then the Cisco Wireless IP Phone 8821 and 8821-EX will utilize active mode when on call,
but still use U-APSD when in idle.
Only disable On Call Power Save for troubleshooting purposes.
Phone Care
The Cisco Wireless IP Phone 8821 and 8821-EX are designed to provide protection from dust, liquid splashes, and moisture.
For standard cleaning, can use a soft, moist cloth to wipe the phone. For thorough cleaning, we recommend using Caviwipes™
or Saniwipes™.
For standard cleaning, can use a soft, moist cloth to wipe the phone. For thorough cleaning, we recommend using Caviwipes™
or Saniwipes™.
Caviwipes and Saniwipes contain up to 17% isopropanol. Any cleaning solution containing a higher amount of isopropanol,
including pure isopropanol, or an alternative alcohol-based liquid could potentially damage the phone.
Do not use bleach or other caustic products to clean the phone.
Do not use compressed air to clean the opening of the phone as it can damage the phone and voids the phone warranty.
Carry cases can additionally help protect the phone further and provide drop protection.
including pure isopropanol, or an alternative alcohol-based liquid could potentially damage the phone.
Do not use bleach or other caustic products to clean the phone.
Do not use compressed air to clean the opening of the phone as it can damage the phone and voids the phone warranty.
Carry cases can additionally help protect the phone further and provide drop protection.
For more information, refer to the Cisco Wireless IP Phone 8821 and 8821-EX User Guide at this URL:
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/8821/english/accessories/w88x_b_wireless-ip-phone-882x-
accessory.html
accessory.html
Accessories
The following accessories are available for the Cisco Wireless IP Phone 8821 and 8821-EX.
• Batteries
• Phone Power Supply
• Holster Case
• Leather Case
• Lanyard
• Desktop Charger