I have a site with 95 SpectraLink 8440 phones and 80 APs with a ZD 3000 running 188.8.131.52.15. 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.
Hi Steve, you may nee to change the default DTIM settings through the CLI on the ZoneDirector. I've had a customer before with the polycomm phones and I found some documentation for the 8440's mention the DTIM value settings requires changing to '2' on your Voice SSID WLAN
Thank you for the responses, I have already made these changes with the same results. At this time the VIEW teams of SpectraLink and Ruckus are working together to solve this issue. Hopefully they will have a fix very soon.