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4.2 BIT SWITCHES ...................................................................................... 4-16
4.2.1 SYSTEM SWITCHES .................................................................... 4-16
4.2.2 SCANNER SWITCHES ................................................................. 4-30
4.2.3 PRINTER SWITCHES ................................................................... 4-38
4.2.4 COMMUNICATION SWITCHES .................................................... 4-44
4.2.5 G3 SWITCHES .............................................................................. 4-52
4.3 NCU PARAMETERS .............................................................................. 4-62
4.4 DEDICATED TRANSMISSION PARAMETERS ..................................... 4-73
4.4.1 PROGRAMMING PROCEDURE ................................................... 4-73
4.4.2 PARAMETERS .............................................................................. 4-74
4.5 SERVICE RAM ADDRESSES ................................................................ 4-78
4.6 SPECIAL TOOLS AND LUBRICANTS ................................................... 4-91
5. REMOVAL AND REPLACEMENT .............................................. 5-1
5.1 PRECAUTION .......................................................................................... 5-1
5.2 NCU AND SPEAKER................................................................................ 5-1
5.3 FCU .......................................................................................................... 5-2
5.3.1 REMOVAL ....................................................................................... 5-2
5.3.2 SRAM DATA RESTORE FROM FCU.............................................. 5-2
5.3.3 SRAM DATA RESTORE FROM FLASH CARD BACKUP ............... 5-4
5.4 ROM UPDATE.......................................................................................... 5-6
5.4.1 FCU ROM DOWNLOAD .................................................................. 5-6
5.4.2 FCU ROM UPLOAD ........................................................................ 5-8
5.4.3 MODEM ROM DOWNLOAD............................................................ 5-9
5.5 SRAM DATA BACKUP AND RESTORE ................................................ 5-11
5.5.1 SRAM BACKUP TO A FLASH MEMORY CARD........................... 5-11
5.5.2 SRAM RESTORE FROM A FLASH MEMORY CARD................... 5-12
5.6 DATA ADDRESS RANGES ON THE CARD .......................................... 5-13
5.6.1 FCU AND BICU ROM DATA.......................................................... 5-13
5.6.2 MODEM ROM AND SRAM DATA ................................................. 5-13
6. TROUBLESHOOTING................................................................. 6-1
6.1 ERROR CODES ....................................................................................... 6-1
6.2 MODEM STATUS CODES IN V.34 PROTOCOL DUMP........................ 6-10
6.2.1 CALLING SIDE .............................................................................. 6-10
Phase 1 (V.8) ..................................................................................... 6-10
Phase 2 (Line Probing) ...................................................................... 6-10
Phase 3 (Equalizer Training).............................................................. 6-11
Phase 4 and 5 (Control Channel)....................................................... 6-11
Phase 6 (Primary Channel)................................................................ 6-11
Control Channel (Post Message - Sh)................................................ 6-12
Control Channel (Post Message – PPh) ............................................ 6-12
Control Channel Recovery (AC)......................................................... 6-13
V.34 End ............................................................................................ 6-13
SM
xxi
Rev. 08/98
A230/A231/A232
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