Справочник Пользователя для Netopia 4753 2a4na

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Voice Configuration   8-1
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This chapter describes the telephony ser vices and configuration of the Netopia 4753 G.SHDSL Integrated 
Access Device. For specific details on configuration and use of the Netopia 4753’s Internet connection, refer to 
 and 
This chapter covers the following topics:
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The Netopia 4753 provides small and medium sized businesses with a complete Centrex PBX system. It 
suppor ts voice call switching between the SDSL link and eight local extensions. Call management features can 
include distinctive ringing, intelligent call for warding, Direct Inward Dial (DID), Caller ID, and hunt groups. 
Impor tant key system features such as call hold, call transfer, and call waiting are all suppor ted.
Note: Since the Netopia 4753 is a Centrex-based IAD, specific voice features available to you via the Netopia 
4753 will depend on the ser vices for which you contract with your ser vice provider.
The Netopia 4753 suppor ts up to eight telephone extensions and up to eight derived voice lines. Like the rest 
of the 4700-series line, the Netopia 4753 includes the Netopia data routing engine for any number of attached 
computers or other network devices connected to a single 10/100 Ethernet por t.
Key features include:
Fax/Modem: Configurable Voice por t for incoming fax or modem calls. This is another term for echo 
cancellation suppor t.
Voice Gateway Interoperability: CopperCom, JetStream, Tollbridge TDSoft, Zhone. General Bandwidth 
suppor t 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 office 
instead of at the company's premises. Typically, the telephone company owns and manages all the 
communications equipment necessar y to implement the PBX and then sells various ser vices to the company.
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Some telephony terms mean different things in Centrex mode and PBX/local switching mode: Toll Restriction, 
Speed Dial, and Distinctive Ringing. The Netopia 4753 operates in Centrex mode.
Toll Restriction Operation - Centrex Mode: When you pick up the phone, you receive a dial tone from the 
central office. When 9 is pressed, the Netopia 4753 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