EXHIBIT 10.40 INSTRUMENT OF ASSUMPTION AND SUBSTITUTION OF GUARANTOR OF LEASE This Instrument of Assumption and Substitution of Guarantor of Lease ("Assumption") is executed and delivered as of the 27th day of July, 2001 by and between WORLD ACCESS,...Instrument of Assumption and Substitution of Guarantor of Lease • April 1st, 2002 • Verso Technologies Inc • Services-computer integrated systems design
