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# Terminology

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This section introduces you to useful IP-Fax-related terminology.

H.323

A multimedia communication protocol that sends or receives files via one-to-one communication over a LAN or the Internet.

SIP

A communication control protocol for Internet telephone that utilizes VoIP (which converts voice information to IP packets) and is equipped with functions such as creating, modifying, and terminating sessions with one or more participants.

Gatekeeper (VoIP gatekeeper)

A gatekeeper manages devices connected to an IP network and converts alias telephone numbers to IP addresses and performs authentication functions. In addition, a gatekeeper governs band (transmission rate assignment) and access control.

SIP server

A SIP server mediates connection requests between devices connected to an IP network and is composed mainly of servers that have the following three functions:

- Proxy server: Receives SIP requests and forwards them on behalf of the requestor.

- Registrar server: Receives information about a device's address within an IP network and registers them in the database.

- Redirect server: Used to inquire the destination address.

Gateway (VoIP gateway)

A gateway connecting a telephone network and IP network, it has functions such as protocol conversion for connecting these different networks, and also connects communication devices (telephones, facsimiles, etc.) to a LAN or other network.

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1. 1. Searching by What You Want to Do
   - I Want to Save Paper
   - I Want to Convert Documents to Electronic Formats Easily
   - I Want to Register Destinations
   - I Want to Operate the Machine More Effectively
2. 2. What You Can Do with This Machine
   - You Can Customize the [Home] Screen as You Like
   - You Can Make Copies Using Various Functions
   - You Can Print Data Using Various Functions
   - You Can Utilize Stored Documents
   - You Can Send and Receive Faxes without Paper
   - You Can Send and Receive Faxes Using the Internet
   - You Can Send and Receive Faxes by Using the Machine without Fax Unit Installed
   - You Can Use the Facsimile and the Scanner in a Network Environment
   - You Can Prevent Information Leakage (Security Functions)
   - You Can Monitor and Set the Machine Using a Computer
   - You Can Prevent an Unauthorized Copy

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