PKCSReq (5)           ----------> Cert request goes into queue
                      <---------- CertRep (5) PENDING
CertPoll (5)          ----------> Still pending
                        X-------- CertRep(5) PENDING
(Network outage)
(Client reconnects)
CertPoll (5)          ----------> CA issues certificate
                      <---------- CertRep (5) SUCCESS
Client installs certificate