SS-I-ETS-300004 | Business Telecommunication (BT) - Transmission characteristics at 2-wire analogue interfaces of a digital private automatic branch exchange (PABX) | Document Center, Inc.

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Business Telecommunication (BT) - Transmission characteristics at 2-wire analogue interfaces of a digital private automatic branch exchange (PABX)

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EDITION 1 - ENGLISH LANGUAGE EDITION - June 30, 1995