Exhibit (d)(4) [LOGO OF EFFICIENT NETWORKS] November 16, 2000 Siemens Corporation 153 East 53/rd/ Street New York, NY 10022 Confidentiality Agreement Ladies and Gentlemen: In connection with the possible transaction ("Proposed Transaction") between...Siemens Aktiengesellschaft/Adr • March 2nd, 2001 • Communications services, nec • New York
Company FiledMarch 2nd, 2001 Industry JurisdictionIn connection with the possible transaction ("Proposed Transaction") between Efficient Networks, Inc. ("Efficient") and Siemens Corporation or one of its affiliates ("Siemens"), and in order to allow Efficient and Siemens to evaluate the Proposed Transaction, each of Efficient and Siemens have and will deliver to the other party certain information about its properties, employees, finances, businesses and operations (such party when disclosing such information being the "Disclosing Party" and when receiving such information being the "Receiving Party"). All information (i) about the Disclosing Party or (ii) about any third party (which information was provided to the Disclosing Party subject to an applicable confidentiality obligation to such third party), furnished by the Disclosing Party or its Representatives (as defined below) to the Receiving Party or its Representatives regardless of the manner in which it is furnished, is referred to in this letter agreement as "Proprietary Info
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