Cisco Cisco IP Phone 8841 Designanleitung
Cisco Wireless IP Phone 8821 and 8821-EX Wireless LAN Deployment Guide
24
Non-overlapping channels must be used and allow at least 20 percent overlap with adjacent channels when deploying the Cisco
Wireless IP Phone 8821 and 8821-EX in an 802.11b/g/n environment, which allows for seamless roaming.
Using an overlapping channel set such as 1, 5, 9, 13 is not a supported configuration.
Wireless IP Phone 8821 and 8821-EX in an 802.11b/g/n environment, which allows for seamless roaming.
Using an overlapping channel set such as 1, 5, 9, 13 is not a supported configuration.
Below is a sample 2.4 GHz wireless LAN deployment.
Signal Strength and Coverage
To ensure acceptable voice quality, the Cisco Wireless IP Phone 8821 and 8821-EX should always have a signal of -67 dBm or
higher when using 5 GHz or 2.4 GHz, while the Cisco Wireless IP Phone 8821 and 8821-EX also meet the access point’s
receiver sensitivity required signal level for the transmitted data rate.
higher when using 5 GHz or 2.4 GHz, while the Cisco Wireless IP Phone 8821 and 8821-EX also meet the access point’s
receiver sensitivity required signal level for the transmitted data rate.
Ensure the Packet Error Rate (PER) is no higher than 1%.
A minimum Signal to Noise Ratio (SNR) of 25 dB = -92 dBm noise level with -67 dBm signal should be maintained.
It is recommended to have at least two access points on non-overlapping channels with at least -67 dBm signal with the 25 dB
SNR to provide redundancy.
To achieve maximum capacity and throughput, the wireless LAN should be designed to 24 Mbps. Higher data rates can
optionally be enabled for other applications other than voice only that can take advantage of these higher data rates.
A minimum Signal to Noise Ratio (SNR) of 25 dB = -92 dBm noise level with -67 dBm signal should be maintained.
It is recommended to have at least two access points on non-overlapping channels with at least -67 dBm signal with the 25 dB
SNR to provide redundancy.
To achieve maximum capacity and throughput, the wireless LAN should be designed to 24 Mbps. Higher data rates can
optionally be enabled for other applications other than voice only that can take advantage of these higher data rates.