 outgoing call. Switchboard attendant is usually not involved in this process. Figure 2.4 Telephone System With "DID" Trunks and Voice Mail Combination Trunks For Outgoing Calls Only VOICE MAIL "DID" Trunks For Incoming "This is Beth Cockrell. Calls Only. Every Extension I'm not at my desk Can Be Dialed Directly right now. Please leave From The Outside. me a message and I'll call you back." Local Telephone Co. Central Office Telephone Extensions Incoming Call - In this scenario, calls are placed directly to the telephone extension, bypassing the switchboard attendant. When the extension is unanswered or in use, the calls forward to Voice Mail. Outgoing Call - Extension dials "9" and selects a combination trunk. Figure 2.5 Telephone System With Automated Attendant and Voice Mail Telephone Answered "Thank you for calling. If you know the extension number you may dial it now. For sales, press 1..." AUTOMATED ATTENDANT Telephone Combination Trunks For VOICE MAIL J Unanswered Incoming And Outgoing Calls Local Telephone Co. "This is Rich Laino. I'm not at my Central Office desk right now. Please leave me a message and I'll call you back." Incoming Call - The PBX, Automated Attendant and Voice Mail are housed in the same room and sometimes within the same cabinet. The call movement is controlled by the system software. Callers answered by the Automated Attendant direct their calls to the correct extension. Outgoing Call - Extensions dial "9" to place outgoing calls on combination trunks. CHAPTER 2 please dial it now. To order a book, dial 1; to place advertising, dial 2; for a company directory, dial 3; or please wait for assis- tance." You still need a live person at some point to handle callers who do not know what they want or who do not wish to use the automated system (Figure 2.5). PBX Functions (Also Called Features) Way back when, some enthusiastic PBX salesperson decided to call PBX operating capabilities "features." These are the ca- pabilities that enhance the systems ability for you to process telephone calls