This page (http://www.polycom.com/security) provides security information like FAQs, Polycom's UC Security Best Practice document as well as a link to the Polycom Security Center, where security advisories are posted. There are also links to government certifications, for example FIPS 140 certificates for Polycom products.
There's also a form there that allows you to report a security problem that you've found in a Polycom product.
