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Question

Some not All Ring Central Polycom Phones Occasionally Deregister and Lose Connection.

  • March 21, 2025
  • 1 reply
  • 26 views

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We use Ring Central Polycom VVX 450s across our organization. I have 2 phones that are occasionally de-registering themselves and stating “No Service” then moments later will come back up. I don’t think it has anything to do with PoE as the phones will stay on during this time. The firewall is allowing for connections out to the IP/Port. Would having inbound connections limited affect this? The phones are on two different switches. Again this is only happening to 2 phones that I’m aware of, out of the 90+ in our environment. Any help would be appreciated. Logs consistently state the following when the outages occur:

032****|sip  |4|00|CPlcmSipTcpSocket::ConnectThreadLocal Failed to connect to 104.245.57.227:5090 : Error[Operation now in progress] on SocketAddr (0x1a49940)
032****|app1 |4|00|Failure reason is Failed to connect to server : Error[Operation now in progress]

1 reply

Crystal_
Community Manager
  • Community Manager
  • 61 replies
  • March 24, 2025

Hi ​@sailorsam122,

It sounds like the affected phones may be experiencing intermittent network connectivity or firewall-related issues. Since most of your phones are working fine, but only two devices are deregistering, here are a few things to check:
 

  • Ensure inbound traffic is not being blocked.
  • Double-check firewall settings to allow SIP and media traffic from RingCentral's IP ranges.
  • If possible, test the affected phones on a known working switch port to rule out hardware issues.
  • Ensure the latest firmware is installed on the affected devices.
  • Try reprovisioning the phones in the RingCentral Admin Portal.

    If the issue persists, we recommend submitting a case for further investigation with our support team. You can do so here:
    🔗 Submit a Case


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