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# Overview of IP-Fax Function

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The IP-Fax function sends or receives documents between two facsimiles directly via a TCP/IP network.

Overview of functions

This function has the following advantages and is suitable for communication within the same LAN:

- Reducing communication costs

- Communicating between IP-Faxes at higher speed than by standard fax

IP-Fax uses SIP and H.323 as the network protocol.

IP-Fax destinations

Specify an IP address or host name instead of a fax number.

- Example of an IP address: 192.168.1.10

- Example of a host name: IPFAX1

When using a gatekeeper, specify an alias telephone number.

- Example of an alias telephone number: 0311119999

When using a SIP server, you can send by specifying SIP user name.

- Example of a SIP user name: ABC

You can also transmit to a G3 facsimile connected to the public switched telephone network (PSTN) via a gateway (T.38-compliant).

- Example of a fax number: 03-1234-5678

You can receive IP-Faxes in the same manner as standard faxes. For details about reception, see Types of Reception.

- IP-Fax supported by this machine is ITU-T Recommendation T.38 compliant.

- SIP allows you to transmit and receive documents over an IPv6 network.

Related topics

Terminology
Notes on using IP-Fax
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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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