Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Amendment No. 1 to Registration Statement on Form F-4 (file no. 333-133919) of our report dated March 30, 2006, relating to the consolidated financial statements of Alcatel and subsidiaries, appearing in the Annual Report on Form 20-F of Alcatel for the year ended December 31, 2005, as amended by Form 20-F/A (Amendment No.1) thereto, and to the reference to us under the heading “Experts” in such Registration Statement.

/s/ DELOITTE & ASSOCIÉS

Neuilly-sur-Seine, France
August 4, 2006