Voice Configuration 8-1CCCChhhhaaaapppptttteeeerrrr 8888VVVVooooiiiicccceeee CCCCoooonnnnffffiiiigggguuuurrrraaaattttiiiioooonnnnThis chapter describes the telephony services and configuration of the Netopia 4752 SDSL Integrated AccessDevice. For specific details on configuration and use of the Netopia 4752’s Internet connection, refer to Chapter7, “Easy Setup” and Chapter 9, “WAN and System Configuration.”This chapter covers the following topics: “Introduction” on page 8-1 “Configuring the Voice Features” on page 8-2IIIInnnnttttrrrroooodddduuuuccccttttiiiioooonnnnThe Netopia 4752 provides small and medium sized businesses with a complete Centrex PBX system. Itsupports voice call switching between the SDSL link and eight local extensions. Call management features caninclude distinctive ringing, intelligent call forwarding, Direct Inward Dial (DID), Caller ID, and hunt groups.Important key system features such as call hold, call transfer, and call waiting are all supported.Note: Since the Netopia 4752 is a Centrex-based IAD, specific voice features available to you via the Netopia4752 will depend on the services for which you contract with your service provider.The Netopia 4752 supports up to eight telephone extensions and up to eight derived voice lines. Like the restof the 4700-series line, the Netopia 4752 includes the Netopia data routing engine for any number of attachedcomputers or other network devices connected to a single 10/100 Ethernet port.Key features include: Fax/Modem: Configurable Voice port for incoming or modem calls. This is the secret term for echocancellation support. Voice Gateway Interoperability: CopperCom, Jetstream, TollBridge Tdsoft, Zhone. General Bandwidthsupport to follow in an upcoming firmware release.Centrex is a simpler variation on the PBX. It is a PBX with all switching occurring at a local telephone officeinstead of at the company's premises. Typically, the telephone company owns and manages all thecommunications equipment necessary to implement the PBX and then sells various services to the company.EEEExxxxppppllllaaaannnnaaaattttiiiioooonnnn ooooffff tttteeeerrrrmmmmssssSome telephony terms mean different things in Centrex mode and PBX/local switching mode: Toll Restrictionand Speed Dial. Since the Netopia 4752 operates in Centrex mode, it may be useful for you to understand howCentrex and local PBX work differently. Toll Restriction Operation - Centrex Mode: When you pick up the phone, you receive a dial tone from thecentral office. When 9 is pressed, the Netopia 4752 detects 9 and returns a busy tone (locally generated).Incoming calls are allowed. This allows local extension calling through the central office, but not long