Using the Campaign Action:
The Campaign action is used to route calls into a campaign after those calls have been routed to an appropriate start point on the voicemail server. The actions properties set whether the call is treated as a caller to the campaign or an agent processing the campaign messages. See Campaign Action.
Using the Park Slot Number:
Set through the Campaign Identification menu, this number can be programmed under a DSS key. That key can then be used by agents to access the campaign. If the DSS key also incorporates a BLF lamp, that lamp is lit when new campaign messages are left.
Through a Web Browser:
See Campaign Web Access.