AndyMR2

Hi Guys, Thought I would update the thread with the resolution. Updated to the latest firmware 5.3.153 and our Spectralink phones aren't dropping calls anymore! One of the bug fixes included in the release: 38428 - Issues that caused Polycom phones to abruptly terminate SIP calls and poor voice quality has been fixed While I'm happy with the result it would have been nice to know that this was already a reported issue being worked on. After tearing my hair out for months I can finally sleep a little easier.

Thanks, have pm'd you and replied to an email from mhowell.

Hi Guys, Apologies for the extremely late reply. We are using an MC 3200 5.3-132 fw with 1020 AP's. We're using Spectralink 8440 handsets with fw 4.2.1.0003 through a Mitel 3300 PBX. We get exactly the same problem on the MC1500 controllers as well and I am struggling with the support here. The controller shows lots of calls and the IP addresses are often back to front in the to from fields on the controller. We also get the one way voice or dropped calls. We did some Wireshark tests to try to capture it and I've put a diagram together here Gliffy Public Diagram - RFBI Analysis . Appreciate any help people may have.

Hey, thanks for the reply. At this particular site we have 53 APs each roughly 10 m apart. We've been getting dropped calls & one way voice. The strange thing in the Meru controller is that it's showing a really high number of active calls (around 40) when I know we'd never have more than 3-4 max going at once. I'm not convinced it's a Meru issue and am looking at the PBX and networking as well but just wanted to explore every avenue.

Hi Guys, Bit of a broad question I know but is there a recommended AP density with the Meru AP's? We have some that can see 12-15 neighbors and I'm concerned that this may be what's effecting some Voice issues we're having on the wifi. Thanks