Dropped and Garbled audio with SpectraLink 8440 Phones

[steve_dreher]

I have a site with 95 SpectraLink 8440 phones and 80 APs with a ZD 3000 running 9.6.1.0.15. We experience dropped audio for up to 8 seconds and then the call will come back. The SpectraLink phone logs show very high Tx and Rx retries. I was told this ZD load addressed dropped audio issues with SpectraLink but we continue to have issues. The SpectraLink phones are at 4.3.0 which is also the latest software. The inside APs are on the 5 GHz band to reduce interference with a separate customer WiFi and the outside APs are on 2.4.

[matty_brown]

The WLAN our phones are connected to are configured like this:
https://www.dropbox.com/s/0iplgrs58ifr7r6/Voice%20VLAN.png

Our AP's are configured all the same, except for the channel numbers that are assigned to them:
https://www.dropbox.com/s/73nda2w5hezu1g4/System%20Default%20AP%20Group.png

Audio Codec Priorities are as per the defaults, as far as I can remember:
https://www.dropbox.com/s/fyl66zfa5pf6ksq/SL8440%20Audio%20Codec%20Priority.png

[keith_redfield]

Matty - great news! - thanks for sharing your observations!