Zoom unstable internet connection

Hi HFindy,

Have you found the solution? Please advise! I'm also struggling with staying live during my online classes. 

Hi,

Here's my solution to avoiding the pain I've experienced for a FULL YEAR and wasted hours on the phone with ATT.  

As was replied to me previously above; problem is not ATT's effective gateway (modem) it is message from there out.  

I have i 50 w/ATT and can't get fiber in my area.  Too slow, and an OBVIOUS difference since covid started a year ago after I'd done 2 years of online live and had never seen the message "unstable internet" once.  NOW, 3-4 times EACH video chat unless Webx and I'm NOT hosting. This has gone on 1 year with no fix offered, techs sent out, etc. 

MY solution: get faster internet with another company.  I've been on the phone no less than 10 hours trying to solve this, including tech support, now finally advanced tech support.  I had to struggle a year before I get someone on the phone willing to do anything other than send a new modem?!!!

ATT advanced tech solution: Plug in.  LOL.  IOW; hard wire.  Pay for wifi-use wired line.  Laughable.  Better patch solution: switch to guest wifi.  It worked, less unstable.  

They will do what they do: keep you on a hamster wheel wasting hours of your time until you plug in the device you are using, get a fiber line, or switch to cable.  

Hope that helps.  And I hope nobody wastes as much time as I have being loyal to ATT.  

I have the same issue - primarily with Zoom and Microsoft Teams - it freezes,  on my MAC book - I lose connectivity

I'm fiber line - still same issues as described above

Same here Google Nest Wifi with ATT Gig fiber. Both zoom and Teams affected...and yes I was connected by Cat 6. Perform speed test during problem - 800 MB up and down. Looked at bandwidth for zoom...trickling at 250kbp up and down...

So... this "trickle" of Zoom traffic... what do you think it should be?

I honestly think it's something up with the Arris BGW-210 built in firewall. Every other internet service is fine, and an 800Mb connection should be able to handle less than 1Mbs of traffic. I'm going to try disabling SIP filtering and IPv6

Okay - all fixed. It was the Arris BGW-210 config. I contacted AT&T support online chat. After describing the problem above the support person immediately said 'I can fix that' and proceeded to increase the 'Channel Bandwidth' on the router and reboot it. Seems to me that this is a known problem given the speed of fix. I expect that AT&T gave the router a firmware update recently and this was a side effect.

Unstable speed only happens with wifi. Connecting via cable shows consistent high speed.

@zakjohn which wifi router are you using?

I have a BWG320-500 Optical Modem and was having the same problem with Zoom and also with streaming movies to my Roku.  I have not proven out the "fix" but based on a previous comment I think I have a solution.  In my case, the setting is on the "Firewall" tab and the "IP Passthrough" sub-tab.  I had to temporarily change the "Allocation Mode" from "Off" to "Passthrough".  The Passthrough Mode needs to be on "DHCPS-Dynamic"  Then you can change the "Passthrough DHCP Lease" time from 10 minutes to several hours.  But then you need to go back and set the Allocation Mode to "Off" again or it breaks some connections (in a strange way).  The good news is, the revised Lease time stays where you put it.