

                       

                            "    㤨쭨...
                            ,  㦨  ⠫."
                  ( ᪠ 堨 ᥥ - 誨 )


        㤨쭨,   ஭  ७. ⠥ 
,  ஭  ⮦  ४.  ᫨  -
,    㯨, 祬  ᣮॢ訩 chip.    
㯠.
         ⪠  " 騪"  
  ᪠  ୮ ଥ "   ⠬ ".
       . 1 ।⠢ ⨯ -奬 譥 ,  
⥪ ᬠਢ 室   㧫, ਢ
ॡ   ॠ樨   奬孨᪨ 襭.


                 1. 䥩  ⥫䮭 
                  (Direct Access Arrangement - DAA)

        - ॣ " 1 ".   
஢  ᮮ⢥⢨ FCC Part 65, Part 15,  ⠭
ᮮ⢥騩 ⠭ - BS6305... 䮭  ᥣ 
⪮ ॣ ॡ  㤮, 砥  -
.
      ᯥ祭 䨧᪮ ᮥ,   ७殮 
ࠤ,    䨪 ⥫䮭 , 좠-
 ࠧ離  ᮣᮢ  -     -
祭 㭪権, ন 奬 DAA. ᫥ 㭪樨 -
稢 ᫥騬 ࠧ.

      1) ⥫ RJ11 ᯥ稢 䨧᪮ 祭  -
㥬 ⥫䮭   ⥫䮭 .  襢 -
 ⥫䮭 砥 ࠫ쭮 室 ,  ⢥ -
ন ४祭 ⥫䮭/, ॠ  ५.
訬 ⮭   ॠ ०  ⥫-
䮭 ⥬ (Key Telephone System) - RJ12, RJ13  প ࠡ
 ஢ 뤥  RJ45, JM8.  ⠡ 1 ਢ-
 祭 ⠪⮢  ᮥ⥫.

                                                        1
Ŀ
    RJ11  RJ12,RJ13  RJ45             JM8          
⠪⠳                               ⠪⠳              
Ĵ
 1        -     -          -            1       Ring transmit
 2        -    A          Tip receive   2       Tip transmit 
 3       Tip   Tip        Ring transmit 3        -           
 4       Ring  Ring       Tip transmit  4        -           
 5        -    A1         Ring receive  5        -           
 6        -     -          -            6        -           
                                        7       Tip receive  
                                        8       Ring receive 


      2) 室    ७殮 ஬, -
 १ 㬥蠥 ᢮ ᮯ⨢  殮 400...500 .
ன ᪠ த饩  ⠭  
 ࠭ଠ  ॠ  筮祭 ⠡-
஭.

      3)    ࠤ, 砥 , 믮
  LC 䨫 (1000 pF   ⪠  ).

      4)  㥬  ন 㭪樨 ᭮
 , "⡮" (ﭭ ⮪  0.5 )  "㤥ঠ
" (ﭭ ⮪  8 ).
       㭨ᠫ쭠 ॠ,  ன   -
 ५,  ﭭ ⮪ ⥪ १ ࠭ଠ.
        ࠧࠡ⪠  ᯮ 奬 Electronic
Holding Coll Circuit (EHCC).    ᮯ⨢ -
 ⮪, 筮  㤥ঠ ,  ࠭ ᮪ -
  ६ ⮪  ᨣ.  ⮬  
⢫ ५  ᠬ 㧥 EHCC  ஭ ࠧ離 ࠢ-
.
      奬 EHCC  ࠭祭 ਬ   ⨯ 
(ਬ, "").

      5)  ࢠ⨢ 㧥 䨪樨 ⥫䮭 . 
᫥      . ᮪⭠ ,
१, ⠡஭, ᢥ⮤ ஭ ࠧ離 ( 让 -
ன    ⨯) - , ,  .

      6)  ॡ  䥩    ᯥ-
 ᨬ筮 室   좠᪠ ࠧ離.  ⮣
ᯮ ࠭ଠ. ஭ ࠧ離 ᥣ ,
᪮॥,  ⨪.
       ࠭ଠ, 뢭 ᮢ襭, ௥
  . 砫 ᯮ짮  -  ⭮ ࠧ-
  ६ ⮪. ⥬ 뫨 ࠧࠡ⠭ ,  -
騥 ࠬ஢  ⥫ ﭭ ⮪ 稢.
 室  ᮪ ᪮  㫮  砫...

      7) ᮢ . 室  室 ᮯ⨢
 ६ ⮪ (300...3400 )   600  +-15%.
⢥ ࠭ଠ   㧮 १ ⮬ .
 㬥襭 ᨬ    ⠭ -
⥫  ࠫ쭮 筮 ⪥ ࠭ଠ.


                2. ७樠쭠 ⥬ (HYBRID)

       ७樠쭮 ⥬ - 室  ஢ 
 ஢ 奬  砭 .  -
 ஭ 室 ᨣ  室 ( ), 
蠥 ॠ ⢨⥫쭮.
      ⭮ ᪮쪮 ⨯ "ᨢ" ॠ権:
      - ࠭ଠୠ,  ன 筠 ⪠ ࠭ଠ-
          । , 砥 १  -
          ;
      - ஭,  奬    寮 ⠭-
        ;  ⮬ 砥 室 ᨣ ⠥  室 
        樮 ᨫ⥫,  ⭠ ᨬ -
         ᯮ짮 饣 ᪠.
       ⮬  奬  ᨬ  ᮯ⨢
⭮ ⥫䮭 . ᪮쪮 ⨯   -
 ன,    ࠢ  ᨬ ᮯ⨢
   ᨢ ⥬  㤠.
      ⨢ ७樠쭠 ⥬ ᯮ  ண -
. 室  樨 ᨣ ﭭ  ᨣ-
 ஬. ନ஢ ⥫   ᣫ
䨫஬,  ⠥  室 ᨣ, ᯥ稢 ᮪ -
⢮ 樨.


            3.  ஭ (Analog Front End - AFE)

      좠᪨ ஢  譥  ࠭ଠ஬ 
ࠧ  室  室 ७樠쭮 ⥬ ᨣ
  " ஭",  ࠧ뢠 졠  -
  模.
      室 ᨣ ନ .  । ᪮⥩ ।-
  筮 10-ࠧ來,   ᮪᪮  -
14...16-ࠧ來.  ⨧樨   7.2  9.6 .
騩 䨫,  ࠢ, 믮   ⥣ࠫ쭮
孮 "४ ஢".  ᯥ稢 -
  32     4.6 .
      室 ᨣ 㯠  ᮢ 䨫.  , -
⢥ V.22bis -  900...1500   2100...2700 . 
᮪᪮   ⨣ 300...4000  (V.34). "-
஦" ᨣ ᨫ ணࠬ ࠢ塞 奬  
 .  ⨧樨  ࠧ來  ਬ୮ -
⢥ .


      4.   (Digital Signal Processor - DSP)

       稫 ६,  "窨"  "" 뤥-
      ஢.  । 
 ⢮ ᥩ । ᫨⥫묨 ᠬ, -
⢮묨  ࠡ⪨ ᨣ.  । 祭 ਢ
 ⠡ 2.
       DSP 믮   筮 孮  ⠫
,    奬 ,   ணࠬ 㦠-
   ஫.   ॠ    ᮢ-
頥   .

                                                        2
   Ŀ
    ४ CCITT    V.22bis       V.32bis    V.34    
    ᪮ । /   2400         14400     28800   
   Ĵ
    ࠧ來        16             16        16      
    த⢨ MIPS   5              20        30      
     /                                         
               *ࠧ.2*16/0.124*16  8*16      32*16    
    ਬ DSP            TMS320C10     ADSP2115  DSP1633F 
   


               5. ஫ (Modem controller - MC)

      প 䥩  ஬, ࠢ DSP, ॠ
⮪ ४樨 訡  ᦠ ଠ樨, ࠢ 짮-
⥫᪨ 䥩ᮬ  ⢨  ࣮ᨬ 
-   祭 㭪権 ஫.
      । 祭 室 ᮢ ਢ  ⠡
3. প  "upgrade" ਢ  ⥯ ।-
 ࠭ "firmware" DSP  ஫   奬  -
  .

                                                       3
   Ŀ
    ४ CCITT    V.22bis       V.32bis    V.34    
    ᪮ । /   2400         14400     28800   
   Ĵ
    ࠧ來        8             8         8        
    த⢨ MIPS   1             4         8        
      *ࠧ. 32 * 8        256 * 8   256 * 8  
      *ࠧ. 32 * 8        32 * 8    32 * 8   
     EEPROM                                          
               *ࠧ. 1 * 1         4 * 1     4 * 1    
    ਬ ஫    i80C51        68000     AT&T C882
   


          6. 䥩  ஬ (Data Interface - DI)

      譨    ஬  楯 -
䥩 RS-232C / V.24.   楯  ࠡ  
ᨭ஭, ⠪   ᨭ஭ ०. 奬 ८ࠧ⥫
஢ 1488, 1489 ᯥ稢 ᮯ殮 ୮  -
䥩  ७  ஢ﬨ.
      ७   ࠡ ⮫쪮  ᨭ஭ ०,
..   ⠢ 室 奬 ᨭ஭ COM  - UART
(16C450  16C550,  ஥  ਥ).  ॠ-
樨,    㫨 ஫஬. 筮  
  祭 UART  饩 設 . 
 ந  COM  (COM1...COM4)  ⠭ 
७ ஬ 뢠.


           7. 䥩  짮⥫ (User Interface)

1)  (SPEAKER).
      ஥    稢 , ந室騥 
⥫䮭 .    ᯮ -
    ᮩ ந,   襢 -
쥧᪨.  㤮⢠ 짮⥫ ஬ 㪠 
ॣ㫨஢ (㧥 volume).
        㧥 㪠 ந  奬:
      - ᨣ ᭨ ᫥ 䨫,   ;
      - ஬ ࠢ ஫   奬 -
         殮 4052;
      - 䨫  ।᪠   ਧ樨 ࠪ-
        ⨪ ⭮ ⨯ ;
      - 奬 LM386, ⠭  +5 , ᨫ ᨣ;
      -  ஢ ன ६ ந
         室, ⠪  室 ᨣ.

2)  樨 (INDICATOR).
      ७     樨.  譨 
ᥣ ᯮ ᢥ⮤ (LED).
       ⭮⥫쭮 ண ன⢠ ਬ ᨬ -
 -⠫᪨  (LCD). ᯮ 
ࠢ  ⮡ࠧ ﭨ , ࠪ⨪ 䨧-
᪮ , 뢥   ணࠬ஢ ०. ᯮ짮-
 ⠭ (HD44780A00-ᮢ⨬) ஢  ᨫ쭮 㢥-
稢 ᥡ⮨,   ந⥫ ⨬ 
業.

3)  ࠢ (CONTROL KEY).
       設⢥   ᢮   ஢  -
४⥫ (SW),  㯭  ࠧન , ⠪  -
 ᯥ樠 "誨", "窨", ᯥ稢騥 "  -
ࠪ".
         LCD 筠  (KEY) ।稢 
㭪樨  ࠢ ० ࠡ.


                         8. ⠭ (POWER)

      ஥  뢠   殮ﬨ +-5
    ⤥  ᯮ +-12 .
      譨  ᮢ ந⢠ ᯮ 譨 -
, ८ࠧ騥 殮 ࢨ筮 ⠭ 220   筮
殮 9..12 . ஥ ⠡ ନ:
      - ᭮ ⠭ +5 ; 筮 ᯮ짮 襭 -
          +12    ⠡, ᥩ 
         ⠡;
      - -5    楯;
      - +-12   䥩 RS-232C.

        ࠧࠡ⪠ ਬ﫨 㯥ਮ 奬 -
שׂ  祭 ⥫쭮  ⥫쭮 殮. 
 ᯮ 寮㯥ਮ,  ⥫쭮 殮
ନ   ࠧ⥫ ⥩.


                          9. ந⥫

       ⥪  㤥  , ᫨  
  ந⥫.    ᫮ ࠧ  
㯯.

1) ࠡ稪 " " -  ᯥ樠஢ 
(chip set).
       । ᪮⥩ । ⭮⥫쭮   易-
    ਧ (     稫): Intel,
Rockwell, ATI, EXAR, Sierra Semiconductor, Silicon Sistems, Hayes,
Sharp, Cermetek, Texas Instrument,  .
       ᮪᪮   稫  ⪮.
  裡  ⥫㭨樨  ਪ᪮ ⨭ AT&T
 "த ਪ᪮ ᨨ" Rockwell International. 稥
஢   ਭ १⮢, ⨣ 㣨 -
ﬨ.

2) ந⥫, ᯮ騥 㭨ᠫ , , 
᫥⢨, ࠧࠡ뢠騥 ᢮  ᨣ쭮 ࠡ⪨:
Motorola Codex, Telebit Corp., U.S. Robotics Inc., ZyXEL,  . 
ॠ樨 ⮪ ᦠ  ४樨 訡 ,  ࠢ,
㯠 業  R. Scott Association.    -
⥫쭮 ন ᢮ ᮡ⢥ ⮪ 䨧᪮ ஢.
        ஭ , ⠪ 뢠, soft-, ண-
ࠬ ᯥ祭  㦠   - ᨢ 
 ,    稫 ப ࠭.

3) 騪   ᭮ chip set.  ⮨  ନ
"ᡮ騪"  ७०⥫쭮 ⮭. ⢮ ࠡ   -
 ⥬, ᪮쪮  ন   chip set
, ᪮쪮 "㬭" ॠ  ࠪ -
     㣨 稭.    ᢮ ४-
樨  ॠ ⥫ 㭪樨  ணࠬ ᯥ祭 -
 ஢ 奬.
      ਢ  ᪮쪮 㯭  ந⥫: AMT
International Industries Inc., Archtek America Corp., ATI
Tecnologies, AT&T Paradyne, Boca Research Inc., Calpak Corp.,
Cardinal Technologies Inc., GVC Technologies Inc., Hayes
Microcomputer Products Inc., Microcom Inc., MultiTech Systems,
Practical Peripherals Inc., Racal-Datacom Inc., Zoom Telephonics
Inc.
