UC500.com

In the latest and greatest build of CME 4.3 for a ISR router there is a new feature for an ephone-dn.
It is the octo-line.

Previously you could configure a ephone-dn with a single voice port or two voice ports with the commands: ephone-dn 1 

ephone-dn 2 dual-line
 
Now you can configure 8 voice ports on a DN with the octo-line like this: 
ephone-dn 3 octo-line 

This will be useful for ephone-dns associated with hardware conferencing and receptionist lines. It also is a great feature for shared lines. When using this with a shared line there are some additional features you can add into an ephone template to support the octo-line dn.

privacy - Prevent others from viewing or barging calls on an octo-line.
privacy-button - Set a shared octo line privacy button.
max-calls-per-button Defines max number of calls per octo-line button of this ephone.

As of this writing the command is not available on the UC500.