Agenda
       What is ACN?
       ACN pros & cons
       What is FSS?
       FSS pros & cons
       Summary comparison
       2  ACN/FSS Comparison
                         What is ACN?
          3
     Call Setup Time Problem
       The root cause…
        H.245 messages require several round-
                trips before media can be sent
       4  ACN/FSS Comparison
       Technical Overview: H.245                                             H.245
                                                                          Multimedia Control
                                                                             CCSRL
                                                                        Splitting and Reassembly
                                                                             NSRP
                                                                         Retransmission Protocol
                                                       Capability            H.223
                                                      negotiation        Bitstream multiplexer
                                                        Channel
                                                        opening
                                                         Multiplex
                                                       entry setting
         5  ACN/FSS Comparison
      Technical Overview: CCSRL                                     H.245
                                                                 Multimedia Control
                                                                   CCSRL
          Splitting and Reassembly                              Splitting and Reassembly
                                                                   NSRP
          Can improve performance in erroneous                  Retransmission Protocol
          connections                                               H.223
                                                                 Bitstream multiplexer
        CCSRL can only worsen the problem of 
          the amount of round trips
        6  ACN/FSS Comparison