PC loses connection ip 331

Occasional Visitor

PC loses connection ip 331



I've several ip 331 phones :

the software version is

BootROM :


All the devices are powered by POE lan ethernet port. So I connect my computers on the PC ethernet.


The issue : when i disconnect a laptop for few minutes of the PC ethernet port, it seems that the port shuts down and i have to restart the phone to get it up, but the phone still up.


Is there any parameter i have to configure ?



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Polycom Employee & Community Manager

Re: PC loses connection ip 331

Hello zarmadaire,


welcome to the Polycom Community.


You would need to check the Phone's Log Files as described => here <= and in addition set the Logging Level for the Support Object to Event 3 or via a configuration file to log.level.change.so="3".


If the PC Port is unplugged and replugged a Message like this will appear in the Log:


0215094822|so   |3|00|Link status is Net up Speed 100 half Duplex, PC down.
0215094824|so   |3|00|Link status is Net up Speed 100 half Duplex, PC up Speed 100 full Duplex.


The Phones can support dot1x / eapollogoff but you would need to contact your Polycom Reseller for further support on this.


Best Regards


Steffen Baier


Polycom Global Services


If official support is required please check how to phone or open a case here

The title Poly Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. All posts and words are my own & do not represent the views of Employer.


Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's
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