Note: Some environments may require that a lower data rate be enabled due to use of legacy clients, environmental factors or
maximum range is required.
Set only the lowest data rate enabled as the single mandatory / basic rate. Multicast packets will be sent at the highest
mandatory / basic data rate enabled.
Note that capacity and throughput are reduced when lower rates are enabled.
Call Capacity
Design the network to accommodate the desired call capacity.
The Cisco Access Point can support up to 27 bi-directional voice streams for both 802.11a/n/ac and 802.11g/n at a data rate of
24 Mbps or higher. To achieve this capacity, there must be minimal wireless LAN background traffic and initial radio frequency
(RF) utilization.
The number of calls may vary depending on the data rate, initial channel utilization, and the environment.
Dynamic Transmit Power Control (DTPC)
To ensure packets are exchanged successfully between the Cisco IP Phone 8800 Series and the access point, Dynamic Transmit
Power Control (DTPC) should be enabled.
DTPC prevents one-way audio when RF traffic is heard in one direction only.
If the access point does not support DTPC, then the Cisco IP Phone 8800 Series will use the highest available transmit power
depending on the current channel and data rate.
When using an access point that supports DTPC, set the client power to match the local access point power.
Do not use default setting of Max power for client power on Cisco Autonomous Access Points as that will not advertise DTPC
to the client.
The access point’s radio transmit power should not have a transmit power greater than what the Cisco IP Phone 8800 Series can
support.
Rugged Environments
When deploying the Cisco IP Phone 8800 Series in a rugged environment (e.g. manufacturing, warehouse, retail), additional
tuning on top of the standard design recommendations may be necessary.
Below are the key items to focus on when deploying a wireless LAN in a rugged environment.
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