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1. 10 NOAA National Oceanic and Atomospheric Ad ministration APT Automatic Picture Transmission 246 2562. 573 1996 6 NTT 64Kbps INS64D IP2 Point to Point Protocol
3. WTERM super version WINDOWS95 ZMODEM YMODEM YMODEM g 9 LHA exe TFC EXE 1 1 A B A B WTERM super version Fig 1
4. RAM DISK 8M byte 2 8 bl Table 2 78 1997 3 Table 2 Communication environment Asynchronus mode Start stop a asynchronization DTE speed 57600 bps Data length 8 bit Stop bit 1 bit RS CS control Nothing Nothing Shift JIS code MNP class 180 or normal mode 28800 bps 256 bit Auto reliable ITU T V 34 ITU T V 42 or MNP Line Public telephone line Flow control Subparameter Parity bit Kanji code Data compression mode Modem speed Max block size Communication mode Error correcting procedures 3 HEMMX NOAA APT MS DOS 8 10 80
5. DTE 3 Table 3 Table 4 Table 8 dummy effective data transfer rate Table 5 able 8 Table 9 Table 9 9600bps
6. 2 RAM DISK MO DISK MS DOS FC EXE 28800bps 3 Table 3 Table 4 NOR MAL YMODEM g ZMODEM 3 NOAA APT 12 Table 3 A comparison of transfer time of each none compression file on 14400 and 28800 bps that used with ITU T V 32bis and V 34 MODEM PROTOCOL 28800 bps FILES s NORMAL YMODEM g ZMODEM ENGLISH 20 2
7. ITU T V 34 MODEM ITU 28800 bps MS DOS Execute a J KH ITU T V 34 Table 1 Equipment and Maker Station A Station B Equipment amp Software Personal computer PC 9821Xe PC 9801DA NEC Display PC TV451 MF 8617ES NEC Printer PC 201H BJ 130J NEC CANNON Magneto optic disk LU 3N 1M0 400 NIHON TEXA Logi tec MODEM PV AF288 PV AF288 ATWA High speed serial interface MC16550 MC16550 MICRO CORE Communication software WTERM super version WTERM super version H Inoue amp Tomtom File compression tool Lil exe LH exe H Yoshi zaki File compare tool MS DOS Ver 6 2 FC exe MS DOS Ver 6 2 FC exe NEC A Station Nagasaki V 34 MODEM Telephone Line Personal Computer Telephone
8. 2 14400bps 28800bps NOAA APT MS DOS 9600bps V 32 MODEM Table 5 9600 bps Table 7 Fig 4 Eg ENGLISH C JAPANESE NOAA APT BR 5 005 EXE S I XX 9 tate gt m EE 4 i tet S 9 9 oo IRERE 9 9 9 9 99 9 0 9 0 ee e ve OK RANA XY 19 9 9 09 9 9 9 9 9 9 4 9 9 4 9 9 4 0 ASA gt CX TS rA NA CT C 4 Od YMODEM g R X K2 NORMAL ZMODEM Experiment Flles Fig 4 Comparison of communication efficiency of none compression files with a ITU T V 32bis and V 34 MODEM 8 p ITU T V 34 Table 7 A comparison of communication efficiency of each none compression file on 14400 and 28800 bps that used with ITU T V 32bis and V 34 MODEM PROTOCOL 28800 bps FILES A NORMAL YMODEM z ZMODEM ENGLISH MB 336 294 286 529 428 JAPANESE
9. 2 1 4 STAs EIROSARSUSR IT GR CE MODEM g ZMODEM 5 DTE 1 2 4 5 1995 pp86 6 1996 p 248 1993 CD ROM DTE PV AF288 3 1996 pp60 62 V 32bis 77 1996 6 7 8 9 10 78 1997 11 ASCII
10. 2 28800bps Table 7 Fig 4 NORMAL 281 NOAA APT 290 9600 bps 285 28800bps 9600bps x 100 300 14400bps 200 YMODEM g NOAA APT 476 530 9600bps 503 NOAA APT MS DOS 53 ZMODEM NOAA APT 371 429 9600 bps 412 YMODEM g NOAA ATP 7 50 NOAA APT DTE
11. Table 10 Fig 5 1 14400bps Table 10 Fig 5 NORMAL 376 371 MS DOS 311 NOAA APT 237 H 99 YMODEM g 470 466 MS DOS 375 NOAA APT 291 111 ZMODEM 420 416 MS DOS 336 NOAA APT 275 139 Table 7 Table 10 NORMAL 220 YMODEM g 130 ZMODEM 130 78 1997 Table 8 A ratio of transfer time with none compression and compression file on 14400 and 28800 bps that used with ITU T V 32bis and V 34 MODEM c PROTOCOL 14400 bps 28800 bps FILES NORMAL YMOD
12. 2 ZMODEM 23900 28100bps 2 9 2 28800bps 60000 14400 bps
13. MS DOS 4 LHA EXE 9600bps 14400bps 4 NORMAL 9 YMODEM g9 ZMODEM9 80 A B 1 1 NORMAL
14. ZMODEM 35700 41200bps MS DOS NOAA APT 14400bps 2 1 2 Table 6 Fig 3 lt gt x XX e OX CK 7976767 SOO xX OS CS e gt oS 4 BQ ENGLISH C JAPANESE 28800 bps NOAA APT MBMS Dos Exe i aac RR ms emm peceeeeeee a 1 1 1 1 i 1 1 i t t 1 1 ood 1 1 t 1 1 1 H burial rSn ric m E ee ees ay Cte re d tek re Seal tet ony t t 1 1 1 t pered 4 E Pon Eo Sd aes 9 i i i 1 I 1 t 1 t 1 L 1 1 SSSSSS gt 1 Fr alae CU TEN IRE XN i CX CX X CC XXX RR 479747479767 S Se e OX SS eX t en 4767474747074707474747474 RRR Gere OO es 1 nc CEPR piu Sa eg om pa md ee ead Ry ne oe we a eng ad Re EAT S
15. 4 ITU T V 34 ZMODEM NOR MAL 5 5 FR byte bps s MS DOS FC EXE2 1 1 160 Appendix 1 1 1 4 9600bps 14400 bps
16. 2 28800bps Table 6 Fig 3 NORMAL 25000 27500bps CH 5 NOAA APT MS DOS Y MODEM g Cii 34300 36500bps CHAR MS DOS NOAA APT ZMODEM 30400 31300bps NOAA APT MS DOS NOAA APT MS DOS 8 28800bps YMODEM g ZMODEM NORMAL V 32bis 14400bps YMODEM g NORMAL 210 ZMODEM 190 V 34 28800bps 180 145 YMODEM Communication Efficien
17. 50000 40000 ERE qus Effective Data Transfer Rate bps xx x CC X AA c 7 Xd o gt ed X ere OOD SS AA 10000 Te x ix SX CX gt e 7609 9 9 9 SOS e ee S t 6 07 50505 SS 2x 5 2 CZ gt 91 X 9 47 CX 52505 ha 2 x x tet eS gt e 7 eX t M eX x n w RS X2 re CO KK YMODEM g 1 i t T 1 4 1 i 1 1 1 I t G 1 1 G 1 1 1 I 1 i 1 1 1 4 ZMODEM Table 5 Fig 2 NORMAL 26900 27800bps NOAA APT MS DOS Y MODEM g 45600 50900bps MS DOS NOAA APT 14400bps 2
18. 256 HOA 1989 pp 40 41 MS DOS Ver 6 2 1994 ppl05 107 MNP 1989 pp 139 139 1993 CD ROM 1993 CD ROM Er 12 J ITU T V 34 Appendix 1 1 Experiment of English files English text files with ITU T V 34 MODEM Used MODEM port speed 28800bps byte Effective data transfer rate bps FILE NAME _ FILE SIZE NORMAL YMODEM g ZMODEM ENGTXTO 48721 27418 50436 41785 ENGTXT1 48779 27175 49876 41834 ENGTXT2 55345 27453 50314 39759 ENGTXT3 49928 27164 51366 42601 ENGTXT4 55909 27433 51012 43679 ENGTXT5 53418 27408 50442 39657 ENGTXT6 57835 27397 49432 41399 ENGTXT7 65639 27754 50726 38453 ENGTXTS l 57438 27456 51101 43154 ENGTXT9 62512 27982 52842 38683 AVERAGE 55552 20 22 10 94 13 57 27464 50755 41100 TOTAL 555524 202 15 109 42 135 74 274640 507546 411005 English compre
19. 0 6 72 25074 36903 30149 TEST2 21948 7 49 25344 38438 29303 TEST3 21288 7 12 25587 39940 29899 TEST4 20079 6 69 25099 36375 30013 TESTS 26574 8 71 25675 35432 30510 TEST6 15606 5 03 24576 36634 31026 TEST 17399 4 92 5 50 24927 35364 31635 TESTS 30824 i 8 74 10 15 25924 35268 30368 TESTO 28461 8 10 9 41 25874 35137 30245 AVERAGE 22567 8 88 6 20 7 43 25338 36584 30403 TOTAL 225665 88 81 61 96 74 94 253381 365838 304034 78 1997 Appendix 1 3 Experiment of NOAA APT files NOAA APT files with ITU T V 34 MODEM Used MODEM port speed 28800bps FILE NAME 115078 125704 115092 125648 125640 115120 115134 115149 125769 125766 AVERAGE TOTAL byte FILE SIZE 246272 246272 246272 246272 246272 246272 246272 246272 246272 246272 246272 2462720 Transfer time s NORMAL YMODEM g 27746 47543 27718 42047 27799 45063 28200 50580 28133 47151 27849 46998 27938 45699 27818 41706 27777 46607 27812 43A11 88 34 54 09 68 89 27879 45681 883 39 540 85 688 88 278789 456806 Compression NOAA APT files with ITU T V 34 MODEM Used MODEM port speed 28800bps FILE NAME 115078 125704 115092 125648 125640 115120 115134 115149 125769 125766 AVERAGE TOTAL byte FILE SIZE 143416 166409 150100 126590 146973 144696 152140 166904 149268 159530 150603 1506026 Transfer time s NORMAL YMODEM g ZMODEM NORMAL YMODEM g 27302
20. g E ONE BS ed NEM S NES g NEN 2 Ba NE BS H NEM D NES D NEN RY N KA 5 NN 53 NG E NEN od p pu end B 99000 MN Be Bl N S PNE NG KSA 2S2 ue S BOs i o nee NN Do bx OO4 OX NN a tote RS Ko 1505 IO 1 CO 0x5 bos ns NS ti Ko 1 Do Ko fx M bo E505 t RO 1 KX gt D px XJ Io NN R5 Ko X591 I 1 B NEEDS SEN Bes BY i 5 M ve NN weet Sete nee SC 1 ood NN 52 NN 55e P t NN Sd NN i ki N BS NES BS 5 NE S NE Bo NEN P6654 RRS Roo Sete NS Do NN bo XA POW 4 LX oe gt 10000 Doo oO e box L 56x L Co RS Nt Ko 1 bo Dx LX Lo oe CX 04 M Rx e bo Dose e 1 otek ut uw fate i Deo 5252 PSSA Ko4 Rx ko bod NN bx h Sete M 5 2 INS od ares bo OO POO D DXX t BOG LXX Lo 1 eX ve 4 5 Sete 1 o Nu sete bo od KO t ele bo Th vet Nt n NN 0901 NN Dos t p S25 Ws NN od3 NN bd od Ko l Pod EXAM eee Sete bo i KA oe 20 bos t Sete NN wate 1 053 4 NN d N RSS NN t dN 4 IN Koo Xd AN NN Eod NN NORMAL YMODEM g ZMODEM NORMAL YMODEM g Experiment Files z e E Fig 2 Comparison of effective data transfer rates of none compression files with a ITU T V 32bis and V 34 MODEM 6 Wo ITU T V 34 Y MODEM g 25500 32400bps MS DOS NOAA APT
21. 00 bps 28800 bps FILES hpsl NORMAL YMODEM g ZMODEM NORMAL YMODEM g ZMODEM ENGLISH 13919 32244 28118 27464 50755 41100 JAPANESE 13892 32408 21931 26979 50905 41219 NOAA APT 14141 25591 24007 27879 45681 35759 MS DOS EXE 13646 26673 23905 21183 45986 40404 Table 6 A comparison of effective data transfer rate of each compression file on 14400 and 28800 bps that used with ITU T V 32bis and V 34 MODEM PROTOCOL 14400 bps 28800 bps FILES bp NORMAL YMODEM g ZMODEM NORMAL YMODEM ZMODEM ENGLISH 12596 15791 14993 25083 35205 JAPANESE 12779 14370 25338 36584 30403 NDAA APT 13954 15945 21524 34389 31337 MS DOS EXE 13209 14539 15153 25526 35645 31164 1 1 BA ENGLISH i JAPANESE 14400 bps 28800 bps NOAA APT 1 1 i i i i i MS DOS EXE 1 i 1 1 1 t ae i B0000 4 oe Errem Ini houses eee 1 bo 1 1 i t Sone i 4 i XI 1 s 1 fete KOM D 1 A NE N NN 1 a cS NE A 1 et NS 1 1 OQ 1 RRA NN BS 40000 Beat Seat sas Terns diem prs a eae ee r 4 Nett 1 Me ren 1 sest Pos i t nee ox J a i 1 bo wok 1 e bd NN A i a NE S SEG o SN BS a E NE Bo 1 1 Ry t a Dx po MAO 5 1 KRA aye NS Bod NN i KSA p LXX NS 1 en e Ar nM o MUI ME DC TE KS amp 30000 2 5 NEC NM 1 DX 4 I gt 1 ES ECR K N RRS NN 1 8 BS E NN E NE BS NEC S a R 24 N E NEM BS nu bod lt eget a ER NY woke ek RSS i
22. 143 338 291 281 530 429 NOAA APT M 267 250 290 416 372 MS DOS EXE 142 278 249 283 479 421 TOTAL 1141 2014 1651 AVERAGE 285 503 413 1 14400bps Table 7 Fig 4 NORMAL MS DOS 142 NOAA APT 147 9600bps 144 OOT E 14400bps 9600bps x 100 150 CH YMODEM g NOAA APT 267 338 9600bps 304 NOAA APT MS DOS 65 ZMODEM MS DOS 249 294 9600bps 271 40
23. 2 10 94 13 57 JAPANESE 23 25 12 44 15 32 NOAA APT 88 34 54 09 68 89 MS DOS EXE 20 40 12 04 13 78 Table 4 A comparison of transfer time of each compression file on 14400 and 28800 bps that used with ITU T V 32bis and V 34 MODEM PROTOCOL 28800 bps FILES S NORMAL YMODEM g 2ZMODEM ENGLISH 15 42 1 15 5 38 6 30 JAPANESE 17 60 8 88 6 20 1 43 NOAA APT 107 90 54 70 43 78 48 07 MS DOS EXE 18 90 9 77 7 03 8 03 4 bps Table 5 Table 6 1 1 Table 5 NOR MAL YMODEM g ZMODEM Fig 2 1 14400bps Table 5 Fig 2 NORMAL 13600 14100bps NOAA APT MS DOS 78 1997 Table 5 A comparison of effective data transfer rate of each none compression file on 14400 and 28800 bps that used with ITU T V 32bis and V 34 MODEM PROTOCOL 144
24. 33761 27303 34632 27326 34098 27200 33830 27354 34204 26820 33776 27304 33907 29976 38045 27374 33733 27279 33906 27524 34389 547 04 437 82 480 69 275238 343802 Appendix 1 4 Experiment of Execute files MS DOS Execute files with I byte FILE NAME FILE SIZE CALC RECORDER MSDOS PROGMAN CARDFILE PIFEDIT WXALSTW CALENDER GAIJEDIT CUSTOM AVERAGE TOTAL 40720 41872 49216 56608 56656 56824 57344 65824 66048 64024 55514 555136 Compression MS DOS Execute FILE NAME CALC RECORDER MSDOS PROGMAN CARDFILE PIFEDIT WXALSTW CALENDER GAIJEDIT CUSTOM AVERAGE TOTAL byte FILE SIZE 22238 20850 25660 22232 28728 25150 18686 33958 22809 29809 25012 250120 TU T V 3A MODEM Used MODEM port speed 28800bps Effective data transfer rate bps Transfer time s NORMAL YMODEM g 26684 41893 26962 45762 27086 45319 27150 47650 27147 45216 27059 47631 27372 46282 27144 45209 28070 48636 27152 46260 20 40 12 04 13 78 27183 45986 20399 12044 137 78 271826 459858 files with ITU T V 34 MODEM NORMAL YMODEM g 25444 35298 25427 35279 25737 34723 25642 35800 25904 34738 25378 35877 23743 37749 26283 36672 25715 35695 25989 34621 9 77 7 03 8 03 25526 35645 97 71 70 30 80 31 255263 356453 13 Effective data transfer rate bps ZMODEM 36355 36248 36005 34868 36302 35522 36073 34657 35978 35578 35759 357587 Effective data transfer rate bps ZMODEM 30
25. 909 30960 30974 31420 30981 30826 30935 34707 30600 31061 31337 313372 ZMODEM 41382 40069 40275 42852 40701 38656 39466 39345 44003 37288 40404 404037 Used MODEM port speed 28800bps Effective data transfer rate bps ZMODEM 32182 31166 30331 30964 32027 30411 31833 30927 30091 31712 31164 311644
26. EM g ZMODEM NORMAL YMODEM g ZMODEM ENGLISH 2 61 2 03 2 15 JAPANESE 2 62 1 99 2 06 NOAA APT 1 61 1 24 1 43 MS DOS EXE 2 09 1 71 1 72 Table 9 A comparison of dummy effective data transfer rate of each compression file on 14400 and 28800 bps that used with ITU T V 32bis and V 34 MODEM PROTOCOL 14400 bps n 28800 bps FILES hps NORMAL YMODEM g ZMODEM NORMAL YMODEM g ZMODEM ENGLISH 35050 45142 40295 71681 103032 88366 JAPANESE 35598 44122 39942 70584 101300 84912 NOAA APT 22165 27894 25407 44885 56644 51135 MS DOS EXE 29885 35009 32211 55812 18536 69494 Table 10 A comparison of communication efficiency of each compression file on 14400 and 28800 bps that used with ITU T V 32bis and V 34 MODEM PROTOCOL 14400 bps 28800 bps FILES A NORMAL YMODEM g ZMODEM ENGLISH 376 470 420 741 1073 920 JAPANESE 371 465 416 736 1955 885 NOAA APT 458 590 533 MS DOS EXE 592 819 724 TOTAL 1295 1602 1447 2543 3537 3062 AVERAGE 324 401 352 636 884 155 10 ITU T V 34 in Dic C EE 1 PJ ENGLISH J C JAPANESE 1 14400 bps 28800 bps SNOAA APT 2 mns i i L FS MS DOS EXE i od i Io RSS i 000 t Ente Sea een M 1 KS RES AC DE Vtt i EE CUT NES 1 1 BOY SY j 1 1 NM i
27. KS 1 H 1 ko 2 T pod Peg 1 BRS 1 BS koo aoe i i Re ES s 1 EO i 4 wets i i o RY 1 Ex RS RO 800 i NS EM ss a aie M NUS dU OBS i sty i PETE 1 BEY 1e EN EIS 1 i i D ke i 050 KS i E i 0501 eke late REM 9 i RSS S054 i ete gaye S o5 gens i i Sese Pets 1 A Ne Ks 90901 l OO 2 al i MS APREA EE Med Mi 2 600 nese sous tone po a 1 t fete S od i KS i 1 1 kd NN 1 d 8 5 E NE 8 i eis i o 1 1 KA t N z 1 2521 x S a i s NN i NN 1 1 Bd Me i BS Yes e in NN ce X LK L 4 xol e mes ete NN l Q 4 eek e iir 1 RY Ex it N x Xd Be Wels E 1 BY d bo i i 3 i i 6 ES CR e KA bo OD 04 Woke EX a Be 50521 RSS Koo eee one 252 IX bos B Ret 1 BS Eod ed i eee Nt d RS Kd i KSS x ares f AA Ke SN 1 RS 6054 bd Root KS 0 090 Reo oo s 1 Bee 090 els 1 1 Id Ss Ee s ES en ue f bc N wets Rose aes tig iets A 1493 Kes NN i teks i bo T ERE ee 2309 woos Sete BS Me 1 Kl KA Sh S we oo Me Hi 1 FS wate e co1 ete EOS e e ass Rese ns 1 Kee oo E coe lt KN M xx AX M i Kee X Eg ee i lt bo i wee N 5c ao an ete A Sn e82 so i K KC KS o SO 6250 See ete A Re 2 j gt DS teh Xe de t A t Woke e et 1 BS Soe aise N KS sd N 4 KM co 521 E Won NORMAL YMODEM g Z
28. MODEM Experiment Files Fig 5 Comparison of dummy communication efficiency of compression files with a ITU T V 32 bis and V 34 MODEM HL 30 120 2 28800bps g Table 10 Fig 5 NORMAL 747 736 MS DOS 592 NOAA APT 468 212 14400bps 200 YMODEM g 1073 1055 MS DOS 819 NOAA APT 590 360 ZMODEM 920 885 MS DOS 724 NOAA APT 533 274 14400
29. NAOSITE Nagasaki University s Academic Output SITE XT Nagasaki university s Academie Output SITE Bera nee ee un DONT ba putre ML a OEN tai eye Nae a Title me ce eere dcs E E MSN Author s D EHE B ERE TEE EE SELEL S EHE T E Citation HH V 78 pp 1 13 1997 Issue Date 1997 03 URL http hdl handl e net 10069 29724 This document is downloaded at 2015 11 06T08 19 02Z http naosite Ib nagasaki u ac jp 78 1997 ITU T V 34 B BH WA An Experiment of Data Transfer with ITU T V 34 MODEM on a Telephone Line and Enhance the Communication Efficiency Masaru KOZUMA Shigeaki YADA Hisaaki TAKAYAMA and Yasuhiro YAMAGUCHI We often heard a topic related to the Internet recently Several millions of people are communicating by a personal computer in Japan They are eager to join in the Internet with high speed modem or INS64 by public telephone line Because many Internet providers have been establishing for above users all over our country Accordingly we carried out a transmission experiment of ITU T V 34 28800bps MODEM that will be used by many users They can connect with the Internet by dial up IP even stay at home Four kinds of files wer
30. Nagasaki Exchahge Office B Station Nagasaki V 34 MODEM Telephone Line i Personal Computer Telephone Fig 1 The block diagram of experiment system 1 dsecepue Y Np uou Table 1 STA TION A ODP Over Drive Processor 100MHz RAM 44MB 2 GB SCSI 2 RS 232C STATION B ODP 120MHz RAM36 MB 2 6 GB SCSI 2 RS 232C ITU T V 34 32bis V 32 V 22bis V 22 V 21 BELL 103 212A V FC V34 300bps 28800 bps DTE 115200bps ITU T V 42 LAPM MNP Class4 MNP Class5 Class10 ITU T V 42bis
31. bps Table 7 Table 10 NORMAL 220 YMODEM g 180 ZMODEM 190 80 100 Table 7 14400bps 28800bps NORMAL 2 YMODEM g 1 7 ZMODEM 1 5 Table 10 2 2 2 2 1 14400bps 2 V 34 28800bps 1 2 9600bps YMODEM_g 503 ZMODEM 413 FE YMODEM g 884 ZMODEM 766 NCHA 3 2
32. cy ooo4 CX CX KKK AO os XS lt SN 9 9 9 0 9 6 9 gt YMODEM g a pp amma m 1 1 D 1 1 L 1 1 1 1 1 1 I D 1 1 D T ZMODEM 78 1997 7 g 30 ZMODEM 45 NOAA APT 1 7 12 DTE 115200bps 57600bps DTE b V 32 bis
33. e used in this experiment There are English text file Japanese text file NOAA APT image file and MS DOS execute file Also compressed files made up from each uncompressed files The purpose of this research is to certify the transfer rate and to improve the communication efficiency by the V 34 28800bps MODEM Results were as follows 1 No transmission error was found during the experiment 2 n average communication efficiency of none compression file had about 41396 with ZMODEM pro tocol and 503 with YMODEM z protocol The numerical value compared with communication speed 9600bps 3 The communication efficiency of compression file was about 766 with ZMODEM protocol and 884 with YMODEM g Thus we can get the best efficiency by using the YMODEM g protocol 4 Communication efficiency of a data transmission by compression file is about 20096 of which by none compression file 5 The dial up IP for the Internet connected good condition by V 34 28800bps on the public telephone line Key word communication efficiency none compression file compression file effective data transfer rate
34. ed ey ep aeaoe RE ge a arene gene cid 7474747674675 75 gt ita oS LLL ddd WIL TS f 1 3 i 1 1 1 1 1 1 t 1 1 1 9 x p M pod NORMAL YMODEM g z E t am Experiment Files Fig 3 Comparison of effective data transfer rates of compression files with a ITU T V 32bis and V 34 MODEM 1 14400bps Table 6 Fig 3 NORMAL 12500 13900bps CHS NOAA APT MS DOS Y MODEM g 14300 15900bps NOAA APT MS DOS ZMODEM 14000 16800bps NOAA APT MS DOS NOAA APT MS DOS
35. ssion files with ITU T V 34 MODEM Used MODEM port speed 28800bps byte Effective data transfer rate bps FILE NAME FILE SIZE NORMAL YMODEM g ZMODEM NORMAL YMODEM g ZMODEM ENGTXTO 16431 24933 38036 31002 ENGTXTI 18265 25545 37816 29894 ENGTXT2 20263 24561 36510 30563 ENGTXT3 17165 25095 35465 30817 ENGTXT4 20471 24084 35851 30193 ENGTXT5 18765 25120 35339 30512 ENGTXT6 19123 25497 35479 30258 ENGTXT7 22223 25485 35219 33928 ENGTXT8 20381 25007 35819 30556 ENGTXT9 21194 25504 35620 30805 AVERAGE 19428 25083 36205 30853 TOTAL __ _ 194281 77 48 53 80 62 96 250833 362053 _ 308528 Appendix 1 2 Experiment of Japanese files apanese text files with ITU T V 34 MODEM Used MODEM port speed 28800bps byte Effective data transfer rate bps FILE NAME FILE SIZE NORMAL YMODEM g ZMODEM TESTO 61249 26958 490918 40914 TESTI 60121 27033 50522 42190 TEST2 58336 26821 50160 41256 TEST3 56179 26867 50205 42722 TEST4 60122 26924 52235 42519 TESTS 68281 27042 49265 41084 TEST6 55407 27120 53845 41349 TEST 55111 26805 51076 42855 TESTS 75148 27110 49407 40643 TEST9 17470 27106 52415 36064 AVERAGE 62742 23 25 12 34 15 32 26979 50905 41219 TOTAL 627424 232 49 123 43 153 15 269787 509047 412194 Japanese compression files with ITU T V 34 MODEM Used MODEM port speed 28800bps l byte Effective data transfer rate bps FILE NAME FILE SIZE NORMAL YMODEM g ZMODEM TESTO 23226 7 52 25301 36347 30886 TESTI 20260
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