configured SIP server by pressing the button and configuring the username, password, and authentication
ID fields.
Figure 105: Trunk Group Configuration
Direct Outward Dialing (DOD)
The UCM630X provides Direct Outward Dialing (DOD), which is a service of a local phone company (or local
exchange carrier) that allows subscribers within a company's PBX system to connect to outside lines directly.
Example of how DOD is used:
Company ABC has a SIP trunk. This SIP trunk has 4 DIDs associated with it. The main number of the office is
routed to an auto attendant. The other three numbers are direct lines to specific users of the company. Now
when a user makes an outbound call their caller ID shows up as the main office number. This poses a problem,