| DN Type | Description |
| Access Resource | A Switch access resource to be used in a multi-site environment for external routing. |
| ACD Position | An extension designated for customer interactions only. |
| ACD Queue | A device in a Switch, typically associated with a number of targets, where customer interactions wait while the control system is looking for an available target. |
| Call Processing Port | An extension connected to a call-processing equipment port. |
| Chat | A Chat address. |
| CoBrowse | A Co-Browse address. |
| Communication DN | A virtual device that applications use to communicate with each other through the User Event mechanism. |
| E-mail Address | An e-mail address. |
| Extension | A regular extension line. |
| External Routing Point | An ISCC (Inter Server Call Control) resource dedicated to supporting the external routing and call overflow functions. |
| Fax | An extension connected to a fax machine. |
| Mixed | An extension line that can be used as both an Extension and an ACD Position. |
| Mobile Station | A mobile station. |
| Modem | An extension connected to data communication equipment. |
| Music Port | A music source. |
| Network Destination | A destination number in network routing. |
| Routing Point | A device in a Switch, not associated with any particular target, where customer interactions wait while a routing application is making routing decisions. |
| Routing Queue | A telephony device that can be used as both a Routing Point and an ACD Queue. |
| Service Number | A service number used as a Routing Point in network routing. |
| Tie Line | A direct communication channel between two Switches of a private telephone network. |
| Tie Line Group | A group of tie lines forming one route. |
| Trunk | A communication channel between the public telephone network and a private telephone network. |
| Trunk Group | A group of trunks forming one route. |
| Video over IP Port | A video channel. |
| Virtual Queue | A virtual device, created and maintained by the switch, with activity identical to an ACD Queue. |
| Virtual Routing Point | A virtual device, created and maintained by the switch, with activity identical to a Routing Point. |
| Voice Mail | A voice mail channel. |
| Voice over IP Port | A Voice over IP (VoIP) Port. |
| Voice over IP Service | A VoIP Service. |
| Voice Treatment Port | An extension connected to an electronic audio equipment port (for example, IVR). |
| Workflow | A Workflow resource. |