44■ General DescriptionYour machine uses the same communication protocols as email: the Simple Mail Transfer Protocol (SMTP). Thedifferences from a standard G3 fax communication using the Public Telephone Network (PSTN) are as follows.■ Differences between Internet Fax and Regular FaxA regular Fax machine goes off-hook, dials, and the phone network completes a circuit over phone lines to thereceiving fax. You pay for the circuit. The two faxes negotiate a connection, synchronize and exchange image data.The Internet Fax works like an email, the image data is broken down into packets and transmitted through your LocalArea Network (LAN) to the Internet or Intranet instead of using a telephone company’s network, thus saving you longdistance costs.■ Transmitted Document Confirmation1. Your machine does not directly connect to the final destination (see note below), but rather connects to a MailServer via LAN. Therefore, if a document cannot be correctly transmitted due to an error, the erroneous mail maybe returned from the Mail Server to your machine.2. The erroneous mail may take a long time to return (20 to 30 minutes) depending on the destination location, trafficon the network or LAN system configuration.3. Depending on the Mail Server, it is also possible that erroneous mail is not returned at all. Therefore, whentransmitting important or time sensitive documents, it is recommended that you follow up with a telephone call toconfirm reception.4. Documents cannot be transmitted correctly if the destination Mail Server does not conform to the MIME protocol.Erroneous mail may not be returned depending on the Mail Server.Note:1) Fax Parameter 172 (Direct IFax XMT), if set to “Valid”, allows you to configure Address Book so that you candirectly send to the destination without medium of SMTP.2) Your machine supports the Delivery Notice feature (See page 130).■ Your machine Cannot Make a Phone Call via LANYour machine can only make a phone call using a regular telephone line (PSTN).■ Dual Port CommunicationYour machine's dual port capability, allows simultaneous G3 Fax Communication over regular telephone line (PSTN)and LAN Communication.■ Transmission ResolutionIn view of PC transmission, the factory default setting for the resolution is set to FINE mode. If required, this setting canbe changed to Normal.Internet Fax FeaturesImportant Information