SIP H.323 Negotiation H.323 Slow Start

The Oracle® Enterprise Session Border Controller can also perform protocol translations for SIP and H.323 Slow Start, where—unlike the cases with Fast Start described above—media information is not sent with the Setup request for an H.323 session. For H.323 Slow Start, media is negotiated after the session is established.

This section’s call flow diagrams show how SIP and H.323 messages flow between SIP UA/GW and an H.323 GK/GW, with the Oracle® Enterprise Session Border Controller positioned between the two entities so it can perform translations. Two sample scenarios with Slow Start appear in the diagrams below:

SIP being interworked to Slow Start H.323
Slow Start H.323 being interworked to SIP