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`BEFORE THE PATENT TRIAL AND APPEAL BOARD
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`GLOBAL TEL*LINK CORPORATION
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`Petitioner
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`V.
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`SECURUS TECHNOLOGIES, INC.
`Patent Owner
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`GLOBAL TEL"‘LINK CORPORATIONS POWER OF ATTORNEY
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`PURSUANT TO 37 C.F.R. § 42.10(b)
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`Mail Stop “PA TENT BOARD ”
`Patent Trial and Appeal Board
`U.S. Patent & Tradetnark Office
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`P.O. Box 1450
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`Alexandria, VA 22313-1450
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`IPR Petition of U.S. Patent No. 9,007,420
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`Pursuant to 37 C.F.R. § 42. l0(b), Petitioner, Global Tel*Link Corporation,
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`having a principal place of business at 12021 Sunset Hills Road, Suite 100, Reston,
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`Virginia 20190, hereby appoints the practitioners of Customer No. 26111 as its
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`attorneys to transact all business in the United States Patent & Trademark Office
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`and Patent Trial and Appeal Board associated with the aboVe—captioned Inter
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`Partes Review of U.S. Patent No. 9,007,420.
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`These attorneys include at least:
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`Lead Counsel Michael D. Specht, Registration No. 54,463
`n1specht—PTAB@skgf.com
`Tel: 202-371-8756
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`Back-up Counsel Joseph E. Mutschelknaus, Registration No. 63,285
`jrnutsche-PTAB@skgf.com
`Tel: 202-371-8874
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`Address STERNE, KESSLER, GOLDSTEIN & Fox P.L.L.C.
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`1100 New York Avenue, N.W.
`Washington, D.C. 20005
`Tel: 202-371-2600
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`Fax: 202-371-2540
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`FOR:
` SIGNATURE:
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`2818839_l .D0cx