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Fax, Modem, and Text for IP Telephony by Gonzalo CCIE No. 4541 Salgueiro, David CCIE No. 3491 Hanes

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Chapter 6. T.37 Store-and-Forward Fax

The ITU-T Recommendation T.37 offers an additional means of transporting fax transmissions beyond the methods of passthrough and relay that have been discussed in the previous two chapters. Often referred to as “store-and-forward fax” the T.37 specification details a process for integrating e-mail with fax communications. T.37 ensures that faxes arrive to users as e-mail, and it also allows users to transmit faxes by simply sending an e-mail.

This chapter first gives a general overview of T.37 and the main protocols and specifications that it is based on. Following that is a look at how e-mail is forwarded using the Simple Mail Transfer Protocol (SMTP). This discussion includes an analysis of the basic operation ...

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