<PAGE> PAGE 1
000 A000000 11/30/97
000 C000000 0001011336
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 A
001 A000000 TCW/DW GLOBAL TELECOM TRUST
001 B000000 811-7591
001 C000000 2123922550
002 A000000 TWO WORLD TRADE CENTER
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10048
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
007 C010200 2
007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A000001 TCW FUNDS MANAGEMENT INC.
008 B000001 A
008 C000001 801-29075
008 D010001 LOS ANGELES
008 D020001 CA
008 D030001 90017
010 A000001 DEAN WITTER SERVICES COMPANY INC.
010 C010001 NEW YORK
010 C020001 NY
010 C030001 10048
011 A000001 DEAN WITTER DISTRIBUTORS INC.
011 B000001 8-45262
011 C010001 NEW YORK
011 C020001 NY
011 C030001 10048
012 A000001 DEAN WITTER TRUST FSB
012 B000001 84-1785
012 C010001 JERSEY CITY
012 C020001 NJ
<PAGE> PAGE 2
012 C030001 07311
013 A000001 PRICE WATERHOUSE LLP
013 B010001 NEW YORK
013 B020001 NY
013 B030001 10036
014 A000001 TCW BROKERAGE SERVICES INC.
014 B000001 8-31114
015 A000001 THE CHASE MANHATTAN BANK
015 B000001 C
015 C010001 NEW YORK
015 C020001 NY
015 C030001 10005
015 E010001 X
018 000000 Y
019 A000000 Y
019 B000000 14
019 C000000 TCW/WITTER
020 A000001 GOLDMAN SACHS AND COMPANY
020 B000001 13-5108880
020 C000001 31
020 A000002 ROBERT FLEMING AND COMPANY
020 B000002 N/A
020 C000002 23
020 A000003 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
020 B000003 13-5674085
020 C000003 12
020 A000004 LAZARD FRERES AND COMPANY
020 B000004 13-5545100
020 C000004 12
020 A000005 MORGAN (J.P.) SECURITIES INCORPORATED
020 B000005 13-3224016
020 C000005 11
020 A000006 AURBACH GRAYSON AND COMPANY INC.
020 B000006 13-3676908
020 C000006 8
020 A000007 BEAR STEARNS AND COMPANY INC.
020 B000007 13-3299429
020 C000007 7
020 A000008 DAIWA SECURITIES AMERICA INC.
020 B000008 13-5680329
020 C000008 5
020 A000009 BANCO SANTANDER S.A. SOCIEDAD DE VA
020 B000009 MADRID
020 C000009 5
020 A000010 BARING SECURITIES INCORPORATED
020 B000010 04-2455153
020 C000010 4
021 000000 159
022 A000001 GOLDMAN SACHS AND COMPANY
022 B000001 13-5108880
022 C000001 9614
<PAGE> PAGE 3
022 D000001 2132
022 A000002 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
022 B000002 13-5674085
022 C000002 7302
022 D000002 0
022 A000003 MAYER AND SCHWEITZER INC.
022 B000003 13-2598328
022 C000003 2259
022 D000003 3967
022 A000004 LEHMAN BROTHERS INC.
022 B000004 13-2518466
022 C000004 4331
022 D000004 1192
022 A000005 BARING SECURITIES INC.
022 B000005 04-2455153
022 C000005 3380
022 D000005 1943
022 A000006 CS FIRST BOSTON INC.
022 B000006 13-5659485
022 C000006 3752
022 D000006 844
022 A000007 DONALDSON, LUFKIN & JENRETTE SECURITIES
022 B000007 13-2741729
022 C000007 3785
022 D000007 0
022 A000008 UBS SECURITIES INC.
022 B000008 13-2932996
022 C000008 871
022 D000008 2208
022 A000009 ROBERT FLEMING & COMPANY INC.
022 B000009 N/A
022 C000009 0
022 D000009 2944
022 A000010 SALOMON BROTHERS INC.
022 B000010 13-3082694
022 C000010 1278
022 D000010 1586
023 C000000 60964
023 D000000 27755
024 000000 N
025 D000001 0
025 D000002 0
025 D000003 0
025 D000004 0
025 D000005 0
025 D000006 0
025 D000007 0
025 D000008 0
026 A000000 N
026 B000000 Y
026 C000000 N
<PAGE> PAGE 4
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
028 A010000 2965
028 A020000 0
028 A030000 0
028 A040000 1549
028 B010000 3174
028 B020000 0
028 B030000 0
028 B040000 1833
028 C010000 4368
028 C020000 0
028 C030000 0
028 C040000 2069
028 D010000 3381
028 D020000 0
028 D030000 0
028 D040000 2329
028 E010000 4966
028 E020000 0
028 E030000 0
028 E040000 2374
028 F010000 1849
028 F020000 0
028 F030000 0
028 F040000 1585
028 G010000 20703
028 G020000 0
028 G030000 0
028 G040000 11739
028 H000000 20703
029 000000 Y
030 A000000 5
030 B000000 5.25
030 C000000 0.00
031 A000000 0
031 B000000 0
032 000000 0
033 000000 7
034 000000 Y
035 000000 196
036 A000000 Y
036 B000000 0
037 000000 N
038 000000 0
039 000000 N
<PAGE> PAGE 5
040 000000 Y
041 000000 Y
042 A000000 0
042 B000000 0
042 C000000 100
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 585
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
048 000000 0.600
048 A010000 0
048 A020000 0.000
048 B010000 0
048 B020000 0.000
048 C010000 0
048 C020000 0.000
048 D010000 0
048 D020000 0.000
048 E010000 0
048 E020000 0.000
048 F010000 0
048 F020000 0.000
048 G010000 0
048 G020000 0.000
048 H010000 0
048 H020000 0.000
048 I010000 0
048 I020000 0.000
048 J010000 0
048 J020000 0.000
048 K010000 0
048 K020000 0.000
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 N
054 A000000 Y
054 B000000 Y
054 C000000 Y
054 D000000 N
054 E000000 Y
054 F000000 N
054 G000000 Y
054 H000000 Y
<PAGE> PAGE 6
054 I000000 N
054 J000000 N
054 K000000 Y
054 L000000 Y
054 M000000 Y
054 N000000 Y
054 O000000 Y
055 A000000 N
055 B000000 N
056 000000 Y
057 000000 N
058 A000000 N
059 000000 Y
060 A000000 Y
060 B000000 Y
061 000000 1000
062 A000000 N
062 B000000 0.0
062 C000000 0.0
062 D000000 0.0
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 0
063 B000000 0.0
066 A000000 Y
066 B000000 N
066 C000000 Y
066 D000000 N
066 E000000 N
066 F000000 N
066 G000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 Y
070 A020000 N
070 B010000 Y
070 B020000 N
<PAGE> PAGE 7
070 C010000 Y
070 C020000 N
070 D010000 Y
070 D020000 N
070 E010000 Y
070 E020000 N
070 F010000 Y
070 F020000 N
070 G010000 Y
070 G020000 N
070 H010000 Y
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 Y
070 J020000 Y
070 K010000 N
070 K020000 N
070 L010000 Y
070 L020000 Y
070 M010000 Y
070 M020000 Y
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 Y
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 86027
071 B000000 78330
071 C000000 136917
071 D000000 57
072 A000000 6
072 B000000 75
072 C000000 570
072 D000000 0
072 E000000 0
072 F000000 431
072 G000000 287
072 H000000 0
072 I000000 164
072 J000000 41
072 K000000 0
072 L000000 12
072 M000000 27
072 N000000 20
072 O000000 0
<PAGE> PAGE 8
072 P000000 2
072 Q000000 0
072 R000000 8
072 S000000 14
072 T000000 585
072 U000000 18
072 V000000 0
072 W000000 1
072 X000000 1610
072 Y000000 0
072 Z000000 -965
072AA000000 13364
072BB000000 7499
072CC010000 21786
072CC020000 0
072DD010000 0
072DD020000 0
072EE000000 0
073 A010000 0.0000
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 1640
074 B000000 0
074 C000000 0
074 D000000 0
074 E000000 4683
074 F000000 137041
074 G000000 150
074 H000000 0
074 I000000 0
074 J000000 2120
074 K000000 1
074 L000000 225
074 M000000 202
074 N000000 146061
074 O000000 1225
074 P000000 282
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 68
074 S000000 0
074 T000000 144486
074 U010000 11351
074 U020000 26
074 V010000 0.00
074 V020000 0.00
074 W000000 0.0000
074 X000000 16769
<PAGE> PAGE 9
074 Y000000 0
075 A000000 0
075 B000000 143225
076 000000 0.00
077 A000000 N
078 000000 N
080 C000000 0
081 B000000 0
082 B000000 0
083 B000000 0
084 B000000 0
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
SIGNATURE BARRY FINK
TITLE VICE PRESIDENT
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
TCW/DW Global Telecom Trust- Class A
Semi-Annual 11/30/97
</LEGEND>
<CIK> 0001011336
<NAME> TCW/DW GLOBAL TELECOM - CLASS A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAY-31-1998
<PERIOD-END> NOV-30-1997
<INVESTMENTS-AT-COST> 120,086,243
<INVESTMENTS-AT-VALUE> 141,873,528
<RECEIVABLES> 2,346,163
<ASSETS-OTHER> 201,443
<OTHER-ITEMS-ASSETS> 1,640,164
<TOTAL-ASSETS> 146,061,298
<PAYABLE-FOR-SECURITIES> 1,225,200
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 350,264
<TOTAL-LIABILITIES> 1,575,464
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 117,271,920
<SHARES-COMMON-STOCK> 16,502
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> (965,178)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 6,392,858
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 21,786,234
<NET-ASSETS> 210,054
<DIVIDEND-INCOME> 569,853
<INTEREST-INCOME> 75,372
<OTHER-INCOME> 0
<EXPENSES-NET> 1,610,403
<NET-INVESTMENT-INCOME> (965,178)
<REALIZED-GAINS-CURRENT> 5,864,632
<APPREC-INCREASE-CURRENT> 8,380,103
<NET-CHANGE-FROM-OPS> 13,279,557
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 18,990
<NUMBER-OF-SHARES-REDEEMED> 2,488
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 22,245,518
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 528,226
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 718,089
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,610,403
<AVERAGE-NET-ASSETS> 121,834
<PER-SHARE-NAV-BEGIN> 12.99
<PER-SHARE-NII> (0.04)
<PER-SHARE-GAIN-APPREC> (0.22)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.73
<EXPENSE-RATIO> 1.69
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
TCW/DW Global Telecom Trust - Class B
Semi-Annual 11/30/97
</LEGEND>
<CIK> 0001011336
<NAME> TCW/DW GLOBAL TELECOM - CLASS B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAY-31-1998
<PERIOD-END> NOV-30-1997
<INVESTMENTS-AT-COST> 120,086,243
<INVESTMENTS-AT-VALUE> 141,873,528
<RECEIVABLES> 2,346,163
<ASSETS-OTHER> 201,443
<OTHER-ITEMS-ASSETS> 1,640,164
<TOTAL-ASSETS> 146,061,298
<PAYABLE-FOR-SECURITIES> 1,225,200
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 350,264
<TOTAL-LIABILITIES> 1,575,464
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 117,271,920
<SHARES-COMMON-STOCK> 11,334,952
<SHARES-COMMON-PRIOR> 10,694,150
<ACCUMULATED-NII-CURRENT> (965,178)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 6,392,858
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 21,786,234
<NET-ASSETS> 143,945,997
<DIVIDEND-INCOME> 569,853
<INTEREST-INCOME> 75,372
<OTHER-INCOME> 0
<EXPENSES-NET> 1,610,403
<NET-INVESTMENT-INCOME> (965,178)
<REALIZED-GAINS-CURRENT> 5,864,632
<APPREC-INCREASE-CURRENT> 8,380,103
<NET-CHANGE-FROM-OPS> 13,279,557
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,540,074
<NUMBER-OF-SHARES-REDEEMED> 899,272
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 22,245,518
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 528,226
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 718,089
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,610,403
<AVERAGE-NET-ASSETS> 142,959,164
<PER-SHARE-NAV-BEGIN> 11.43
<PER-SHARE-NII> (0.09)
<PER-SHARE-GAIN-APPREC> 1.36
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.70
<EXPENSE-RATIO> 2.32
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
TCW/DW Global Telecom Trust - Class C
Semi Annual 11/30/97
</LEGEND>
<CIK> 0001011336
<NAME> TCW/DW GLOBAL TELECOM - CLASS C
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAY-31-1998
<PERIOD-END> NOV-30-1997
<INVESTMENTS-AT-COST> 120,086,243
<INVESTMENTS-AT-VALUE> 141,873,528
<RECEIVABLES> 2,346,163
<ASSETS-OTHER> 201,443
<OTHER-ITEMS-ASSETS> 1,640,164
<TOTAL-ASSETS> 146,061,298
<PAYABLE-FOR-SECURITIES> 1,225,200
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 350,264
<TOTAL-LIABILITIES> 1,575,464
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 117,271,920
<SHARES-COMMON-STOCK> 25,196
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> (965,178)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 6,392,858
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 21,786,234
<NET-ASSETS> 319,963
<DIVIDEND-INCOME> 569,853
<INTEREST-INCOME> 75,372
<OTHER-INCOME> 0
<EXPENSES-NET> 1,610,403
<NET-INVESTMENT-INCOME> (965,178)
<REALIZED-GAINS-CURRENT> 5,864,632
<APPREC-INCREASE-CURRENT> 8,380,103
<NET-CHANGE-FROM-OPS> 13,279,557
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 26,728
<NUMBER-OF-SHARES-REDEEMED> 1,532
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 22,245,518
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 528,226
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 718,089
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,610,403
<AVERAGE-NET-ASSETS> 260,813
<PER-SHARE-NAV-BEGIN> 12.99
<PER-SHARE-NII> (0.07)
<PER-SHARE-GAIN-APPREC> (0.22)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.70
<EXPENSE-RATIO> 2.53
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
TCW/DW Global Telecom Trust - Class D
Semi-Annual 11/30/97
</LEGEND>
<CIK> 0001011336
<NAME> TCCW/DW GLOBAL TELECOM - CLASS D
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAY-31-1998
<PERIOD-END> NOV-30-1997
<INVESTMENTS-AT-COST> 120,086,243
<INVESTMENTS-AT-VALUE> 141,873,528
<RECEIVABLES> 2,346,163
<ASSETS-OTHER> 201,443
<OTHER-ITEMS-ASSETS> 1,640,164
<TOTAL-ASSETS> 146,061,298
<PAYABLE-FOR-SECURITIES> 1,225,200
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 350,264
<TOTAL-LIABILITIES> 1,575,464
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 117,271,920
<SHARES-COMMON-STOCK> 771
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> (965,178)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 6,392,858
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 21,786,234
<NET-ASSETS> 9,820
<DIVIDEND-INCOME> 569,853
<INTEREST-INCOME> 75,372
<OTHER-INCOME> 0
<EXPENSES-NET> 1,610,403
<NET-INVESTMENT-INCOME> (965,178)
<REALIZED-GAINS-CURRENT> 5,864,632
<APPREC-INCREASE-CURRENT> 8,380,103
<NET-CHANGE-FROM-OPS> 13,279,557
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 771
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 22,245,518
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 528,226
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 718,089
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,610,403
<AVERAGE-NET-ASSETS> 10,269
<PER-SHARE-NAV-BEGIN> 12.99
<PER-SHARE-NII> (0.02)
<PER-SHARE-GAIN-APPREC> (0.23)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.74
<EXPENSE-RATIO> 1.58
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>