ocr: 1.- - Query and response for new users address 2. - - - - Session estabishment with H.225 3. e*evet:" Feature negotiation with H.245 Gatekeeper 1. 1. 2. PCI running 3. PC running H323 client H.323 client soitware software Figure 1.The time needed to set up a call is the key problem with H.323. Since the features of the call, such as whether or not to invoke video, are only negotiated after the call is established, setup times are much longer with H.323 than with SIP
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