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Published by British Telecom Technical
Publications.
All possible care has been taken in the
preparation of this publication, but British
Telecommunications plc accepts no liability
for any inaccuracies that may be found.
British Telecommunications plc's policy is
one of continuous improvement and it may
make changes without notice both to this
publication and to the product which it
describes.
<O British Telecommunications plc 1991
Please do not reproduce, transmit, transcribe,
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British Telecom is a registered trademark of
British Telecommunications plc.
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