Client roaming – values are communicated to CCX compliant clients. may be a little low for a VoWLAN deployment, as VoWLAN cell sizes are usually smaller.
Voice call admission control – default value for Max Bandwidh = 75%
For best performance, the most accurate assessment of call capacity; Load Based AC should be enabled.
Max RF Reservation should not be greater than 60% - set at 40-60%
Troubleshooting – WCS is best place to start
DHCP option 150 = TFTP server for phone firmware
To reset the phone to factory defaults = **2
To unlock the phone configuration = **#
7921s do not support WPA2 with TKIP
7921s support WPA2 with AES, but CCKM is not supported
ACS must be configured to explicitly support EAP-FAST authentication. 7921g supports only the automatic provisioning of the PAC, so Anonymous In-Band PAC Provisioning must be enabled.
If a 7921 phone has both radios enabled:
- if default AUTO-RSSI is enabled, the phone will associate to the strongest RSSI on bootup
- if auto b/g or auto a is enabled, the phone will connect to auto setting and will fall back to non specified frequencies if the specified frequency is unavailable. If the phone has associated to an AP on a particular band, it will only scan for & roam to APs on the same frequency band.