VoIP phones losing connection randomly for a brief moment
So back story here. Just installed two SG200-26 switches (replacing a unmanaged switch) which are connected together via a trunk.
However my SPA921 VoIP phones randomly have the Mic light flash red (which indicates loss of network connection). It happens for a literally a second and reconnects. When pinging the phone you can see a single ping not getting a reply. It also appears randomly on what seems to be most of the phones but not all at the same time, some may be fine while maybe one or two have the issue. It may have it continuously loosing connection for a brief moments for a while then likewise it my be fine for a while or the rest of the day.
Im looking for some ideas for troubleshooting. So far I tried changing the phone ports to static 10M half duplex instead of autosensing and this seems to not have resolved the issue.
Re: VoIP phones losing connection randomly for a brief moment
Still looking for help with this one. I have 'played' about with every function (I think), or well turned a lot of stuff off (auto port speed, auto mdix, green ethernet, stp and other stuff). I have tried this on both my new switches.
I have tried factory resetting the switches and setting them stand alone with only the phones and my laptop plugged in and still have the intermittent Flashing Microphone light(breif connection loss). The fact its happening on both switches rules out hardware (not that that was likely).
Is there something I am missing, or something I need to turn on?
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