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vvx410/500 Pin Auth

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vvx410/500 Pin Auth



Our company is in the process of transferring over to Lync using the Polycom vvx410, 500 and cx3000 phones.

We use Microsoft DHCP and DHCP is enabled on the lync server as well.


At the moment users can login by manually entering user details and also by using BToE.


However, when trying to use the Pin Authentication, login fails. the cx3000 gets a web service is unavailable error as well.

I have otions 120, and 43 sub-options using the dhcputil config script. Our servers are virtually hosted by telstra and we have the different states going to different vlans.


The phones successfully get ip addresses and i have the provisioning server working for automatic updates.


The offices are configured so

perth =

melbourne =

sydney =


the lync server resides on


Unfortunatley i don't have access to a phone log thats up to date at the moment so i will post that when i can. At the moment i have wireshark traces on the phone when a pin auth is tried. file attatched.


If anyone could give any insight to why this is that would be fantastic.


Kind Regards




Polycom Employee & Community Manager

Re: vvx410/500 Pin Auth

Hello deanvdwath,

welcome to the Polycom Community.

The community's VoIP FAQ contains this post here:

Jan 19, 2012 Question: How to troubleshoot Polycom VoIP related Issues?

Resolution: Please check => here <=


The above post contains details how to troubleshoot DHCP issue regarding LYNC.


Looking at your attached Wireshark trace the ACK does not contain a valid Option 43 string and therefore the PIN authentication fails.


I suggest you work with Microsoft on setting up your environment correctly.

Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier

Polycom Global Services

The title Polycom 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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