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Interface X
mls qos trust device cisco-phone
mls qos trust dscp
Sample Voice Packet Capture
The packet capture below displays a voice packet bound for the Cisco Unified IP Phone 9971 over the air being marked as
DSCP = EF and UP = 6.
Call Admission Control
Inbound and outbound call admission control can be enabled on the access point.
• Enable Call Admission Control / Wi-Fi MultiMedia Traffic Specifications (TSPEC)
• Set the desired maximum RF bandwidth that is allocated for voice traffic (default = 75%)
• Set the bandwidth that is reserved for roaming clients (default = 6%)
The Cisco Unified IP Phone 9971 will auto-negotiate the PHY rate to be used for TSPEC. By default it will try 12 Mbps, but if
not enabled on the access point, then it will try the next highest enabled data rate on the access point.
There is no support for load-based CAC or multiple streams on the Cisco Autonomous Access Points therefore it is not
recommended to enable CAC on Cisco Autonomous Access Points.
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