b.&nbsp;<u>Modifications/Waivers.</u>&nbsp;Except as expressly provided elsewhere in this Agreement, this Agreement may not be changed or modified, nor may any provisions hereof be waived, nor may any consent or confirmation be considered to have been given, except by an agreement in writing signed by the Party against whom enforcement of the change or modification is asserted, and any such modification, change, waiver, consent or confirmation on Vonage’s behalf may only be given by an authorized signatory of Vonage. The failure of either Party to exercise in any respect any right provided for herein shall not be deemed a waiver of any further rights hereunder.</p> <p> <br> </p> <p>c.&nbsp;<u>Severability.</u>&nbsp;If any provision of this Agreement, or any part of such provision, is found to be unenforceable or invalid, that provision will be (to the minimum extent necessary) replaced by a valid and enforceable provision the effect of which comes as close as possible to the intended economic effect of the unenforceable or invalid provision, so that this Agreement will otherwise remain in full force and effect and enforceable.</p> <p>