PKCSReq (9)           ----------> Cert request goes into queue
                      <---------- CertRep (9) PENDING
CertPoll (9)          ----------> Still pending
                      <---------- CertRep (9) PENDING
CertPoll (9)          ----------> CA issues certificate
                        X-------- CertRep(9) SIGNED CERT
(Network outage)
(Client reconnects)
CertPoll (9)          ----------> Certificate already issued
                      <---------- CertRep (9) SUCCESS
Client installs certificate