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# On the fly format translation NL to CR/LF
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TTTTAAAABBBBLLLLEEEE 5555.... Protocol Checklist
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_________________________________________________________________________
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|Item XMODEM WXMODEM YMDM-k YMDM-g ZMODEM SKermit|
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_|________________________________________|__________________|__________________|__________________|________________|________________|__________________|_
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|IIIINNNN SSSSEEEERRRRVVVVIIIICCCCEEEE | 1977 | 1986 | 1982 | 1985 | 1986 | 1985 |
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_|____________________|_________|_________|_________|________|________|_________|
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|UUUUSSSSEEEERRRR FFFFEEEEAAAATTTTUUUURRRREEEESSSS | | | | | | |
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|User Friendly I/F | - | - | - | - | YES | - |
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|Commands/batch | 2*N | 2*N | 2 | 2 | 1 | 1(1) |
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|Commands/file | 2 | 2 | 0 | 0 | 0 | 0 |
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|Command Download | - | - | - | - | YES | YES(6) |
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|Menu Compatible | - | - | - | - | YES | - |
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|Transfer Recovery | - | - | - | - | YES | - |
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|File Management | - | - | - | - | YES | - |
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|Security Check | - | - | - | - | YES | - |
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|YMODEM Fallback | YES | YES | YES | YES | YES | - |
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_|____________________|_________|_________|_________|________|________|_________|
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|CCCCOOOOMMMMPPPPAAAATTTTIIIIBBBBIIIILLLLIIIITTTTYYYY | | | | | | |
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|Dynamic Files | YES | YES | FFFFAAAAIIIILLLL | FFFFAAAAIIIILLLL | YES | YES |
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|Packet SW NETS | - | YES | - | - | YES | YES |
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|7 bit PS NETS | - | - | - | - | (8) | YES |
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|Old Mainframes | - | - | - | - | (8) | YES |
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|CP/M-80 | YES | YES | YES | - | YES(9)| - |
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_|____________________|_________|_________|_________|________|________|_________|
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|AAAATTTTTTTTRRRRIIIIBBBBUUUUTTTTEEEESSSS | | | | | | |
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|Reliability(5) | fair | poor | fair(5)| none | BEST | HIGH |
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|Streaming | - | YES | - | YES | YES | YES |
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|Overhead(2) | 7% | 7% | 1% | 1% | 1% | 30% |
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|Faithful Xfers | - | - | YES | YES | YES | YES |
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|Preserve Date | - | - | YES | YES | YES | - |
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_|____________________|_________|_________|_________|________|________|_________|
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|CCCCOOOOMMMMPPPPLLLLEEEEXXXXIIIITTTTYYYY | | | | | | |
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|No-Wait Sample | - | REQD | - | - | opt | REQD |
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|Ring Buffers | - | REQD | - | - | opt | REQD |
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|XMODEM Similar | YES | LOW | HIGH | HIGH | LOW | NONE |
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|Complexity | LOW(5)| MED | LOW(5) | LOW | MED | HIGH |
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_|____________________|_________|_________|_________|________|________|_________|
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|EEEEXXXXTTTTEEEENNNNSSSSIIIIOOOONNNNSSSS | | | | | | |
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|Server Operation | - | - | - | - | YES(4)| YES |
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|Multiple Threads | - | - | - | - | future| - |
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_|________________________________________|__________________|__________________|__________________|________________|________________|__________________|_
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NOTES:
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(1) Server mode or Omen Technology Kermit AutoDownload
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Chapter 16 Rev 10-27-87 Typeset 10-27-87 39
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Chapter 16 ZMODEM Protocol 40
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(2) Character count, binary file, transparent channel
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(3) 32 bit math needed for accurate transfer (no garbage added)
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(4) AutoDownload operation
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(5) CCCCyyyybbbbeeeerrrrnnnneeeettttiiiicccc DDDDaaaattttaaaa RRRReeeeccccoooovvvveeeerrrryyyy((((TTTTMMMM)))) improves XMODEM and YMODEM
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reliability with complex proprietary logic.
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(6) Server commands only
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(7) No provision for transfers across time zones
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(8) Future enhancement provided for
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(9) With Segmented Streaming
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WXMODEM: XMODEM derivative protocol with data encoding and windowing
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