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Characteristics of Fax Communication Types

G3 fax, Internet Fax, and IP fax have the following differences.

G3 Fax

Internet Fax

IP Fax

Through SMTP

Direct SMTP

Real-time communication

✔ *1

-

✔

✔ *1

Communication with G3 fax-compatible devices

✔

✔

When using a relay device

✔

✔

When using a VoIP gateway

Communication cost

Pay-as-you-go system based on distance/time

Network usage fee only

*2

Network usage fee only

Email server (email address)

Not required

Required

Not required

Not required

Destination entry/Format

Fax number

Email address

Account@

*3

Fax number, user name, or SIP_URI

✔: Possible -: Not possible

*1 The sender and receiver negotiate document size, resolution, and other settings, and communicate while confirming that each page has been correctly received.

*2 Free within an intranet, but charges from your contracted provider or similar may apply when accessing external networks.

*3 The destination must be entered in email address format.