The Cisco TelePresence Hardening Guide has been updated, adding the DX70, DX80, and DX650 models. The Cisco DX Series run the Google Android operating system, which has special considerations for security.
The updates cover security areas related to:
The hardening guide can be found at the following URL:
http://www.cisco.com/web/about/security/intelligence/TP_Harden_Guide_wp.html
Give it a read and learn how to harden your TelePresence DX system.