Store-and-Forward Full Internet Fax Dave Crocker Brandenburg Consulting US: +1 (408) (19) (408) Dave Crocker Brandenburg Consulting US: +1 (408) (19) (408)

© 1998 D. Crocker, Brandenburg Consulting2 Pro-forma marketing Dave Crocker 4 , EDI, Fax, … 4 Tech. development 4 Startups 4 MCI Mail 4 Internet standards 4 Standards mgmt Brandenburg Consulting 4 Internet business plans 4 Product, system designs 4 Technical audits 4 Internet standards tracking, contribution

© 1998 D. Crocker, Brandenburg Consulting3 Present in this talk  Store-and-forward fax  Standards effort  Technical details  Status

© 1998 D. Crocker, Brandenburg Consulting4 Nature of fax service  What you already know... 4 Document transmission 4 Multi-media objects 4 Immediate confirmation 4 Broad reach 4 Very easy use  Value-added features 4 Multiple recipients 4 Sub-addressing

© 1998 D. Crocker, Brandenburg Consulting5 Fax over the Internet?  Cheaper than telephone  Integrate with other services  Greater bandwidth (for color)  All the rest is (potentially interesting) commentary...

© 1998 D. Crocker, Brandenburg Consulting6 Simple Mode review  Data 4 Tiff 4 Packaged in MIME as image/tiff  Transport 4 Classic, conformant Internet Mail 4 Telephone number encoding for offramp gateways to use

© 1998 D. Crocker, Brandenburg Consulting7 Building on Simple Mode  Approach 4 Use Simple Mode 4 Add confirmation, capabilities exchange, “session”  Issues 4 Confirmation semantics between fax and 4 asynchrony makes “exchange” problematic 4 “session” brand new

© 1998 D. Crocker, Brandenburg Consulting8 Standards effort  Efforts 4 IETF-Fax working group now seems primary venue... 4 ITU schedule is creating the deadlines  Issues 4 Changes to architecture? 4 Schedule

© 1998 D. Crocker, Brandenburg Consulting9 Confirmation  Fax 4 Delivery confirmation 4 What does it really mean?  4 Delivery Service Notice (DSN) 4 Message Disposition Notice (MDN)

© 1998 D. Crocker, Brandenburg Consulting10 Confirmation / take 2  If fax requires special confirmation mechanism 4 Won’t interwork with regular 4 Might take longer to standardize  This is going to require compromise...

© 1998 D. Crocker, Brandenburg Consulting11 Capabilities exchange  isn’t interactive 4 Can’t get capabilities before sending 4 Capabilities might be out of date  So, 4 Define information format 4 Define multiple ways to send/get it: /MIME, SMTP, Directory, …

© 1998 D. Crocker, Brandenburg Consulting12 Capabilities / take 2  Directory service 4 Very long on promises 4 Very short on service  No one mechanism likely to satisfy all needs 4 So, plan to use multiple  This is going to take compromise…

© 1998 D. Crocker, Brandenburg Consulting13 “Session” mode  isn’t “real time” 4 But it can be pretty speedy 4 So, set up end-to-end, SMTP-based association for sending mail  “Confirmation” will be interactive  Capabilities exchange will be interactive

© 1998 D. Crocker, Brandenburg Consulting14 Session mode / take 2  Significant enhancement to Internet Mail 4 Architecture enhancements always challenging 4 Infrastructure (internal) changes always take long time

© 1998 D. Crocker, Brandenburg Consulting15 Status  Seeking 4 Full set of draft specificaions for August IETF 4 ITU “determination” in early November 4 IETF completion in December 4 ITU approval in early ‘99