POWER OF ATTORNEY

I, James M. Sheehan, of 1415 West Diehl Road, Naperville, Illinois 60563,
hereby appoint each of Paul Liebenson of 1415 West Diehl Road, Naperville,
Illinois 60563 and Angie Daum of 1415 West Diehl Road, Naperville, Illinois
60563 as attorney-in-fact to act for me and in my name for the
purpose of completing, signing and filing, in my name and on my behalf,
any of the following forms for Tellabs, Inc. pursuant to the terms of
Securities Exchange Act of 1934 and the Securities Act of 1933:

	Form 3 - Initial Statement of Beneficial Ownership of Securities

	Form 4 - Statement of Changes of Beneficial Ownership of Securities

	Form 5 - Annual Statement of Beneficial Ownership of Securities

	Form 144 - Notice of Proposed Sale of Securities


This power shall become effective on January 1, 2006, and shall continue in
effect until terminated in writing by me or until either of my attorneys-in-
fact shall die, become legally disabled, terminate their employment with
Tellabs, Inc. or its subsidiaries for any reason, resign or refuse to act.

I am fully informed as to all the contents of this form and understand the
full import of this grant of powers to either of my attorneys-in-fact.

This Power of Attorney shall supersede any previously granted power related to
the subject matter herein.


/s/ James M. Sheehan
___________________________________________
James M. Sheehan


State of Illinois              )
		       	       ) SS
County of Will	               )


NOTARY

The undersigned, a notary public in and for the above county and state, this
24th day of January, 2006, certifies that James M. Sheehan, known to me to
be the same person whose name is subscribed to the foregoing Power of Attorney,
appeared before me in person and acknowledged signing and delivering said
document as his/her free and voluntary act, for the uses and purposes therein
set forth.


/s/ Katrina Brown
___________________________________________
Notary Public