When calling an extension that is busy, request a call when the extension becomes free.
When calling an extension that only rings, request a call when the extension is next used.
Depending on the type of phone a user has, request a call back when free by dialing a short code if an internal busy tone is heard, selecting an option from an interactive menu or pressing a programmed DSS/BLF key. A user can also set a callback when free or a callback when next used using a short code without attempting a call.
This feature is available across both multisite and small community networks.