I have a problem with roaming between wireless antennas since phones 7921. The phone does the roam between APs when it reaches a -78dB threshold at which the call is cut or degrades much.
In our network VoIP over WLAN we have: 802.11b / g; WLC 2112 (ver.126.96.36.199), 12 access points LAP1131G and phones.
How can do to make the decision to roaming occurs before coming to degrade the call?
My values in "Roaming Client Section" are:
Minimum RSSI -80 dBm
Hysteresis 2 dB
Scan Threshold -72 dBm
Transition Time 5 Seconds