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To avoid this glare condition , UA is recommended not to send an offer , which currently must be in an UPDATE request , if it has generated the reliable provisional response with the answer to the offer in the INVITE request which is not acknowledged with a PRACK request . Repair mechanisms might for instance be based on explicit updating requests from decompressor to compressor , updates sent by the compressor on a regular basis or methods applied locally at the decompressor side . For this reason there is a Update Request and Update Acknowledgement messages , and a Locator List option . Even if the frame rate was one per 30 ms and the link roundtrip time was only 60 ms the typical loss burst would be 3-4 frames ( one discarded at link level , next discovers damage , update requested , update sent ) , which would decrease the voice quality significantly . OpenDoc forwards update requests to all the embedded parts , and each part has the responsibility for drawing itself . In the case where the new keys were generated for a renew or update request and for rekey requests , once the Peer receives the confirmation acknowledgement from the PKI , it is good practice for the old key pair to be destroyed as soon as possible . The server waits passively for update requests from its clients . In addition to the bond issue , UNC General Administration has requested that each of the universities submit an updated request for our capital improvements to upgrade the amounts of all new construction and major renovation projects to bring them to " state of the art " levels . After receiving the update request , the portal server requests CLM to recalculate the locations of the best surrogates ( 2 ) . The update statement causes zero or more update requests to be queued for deferred execution , one for each row updated . We have responded to several account creation and update requests and worked with trouble areas to get over any humps that you may have had .