I'm Philipp working in the network team of the University of Basel, Switzerland. We use NAV since many years to provide self-service port administration for our colleagues and power users throughout our campus. NAV became a key service that everyone highly appreciates. Many thanks for your great effort at this point!
Yesterday I submitted a feature request at github.com, unfortunately _after_ reading "hacking.rst"
It's about providing an option (because I'm not sure everybody with cisco_voice_vlan = true want's this) in PortAdmin to automatically enable CDP if you check the "Tel" checkbox.
We already have a patch for that, however, without the possibility to opt in or out which needs some additional config file parsing.
But before I submit anything, what do think about the idea of automatically enable CDP on voice ports?