IWF Codec Negotiation H.323 Slow Start to SIP

For instances when the Oracle® Enterprise Session Border Controller is translating a call initiated in H.323 slow start to SIP, you can enable a setting in the IWF configuration that prevents the sending an SDP offer in the SIP INVITE. Instead, the Oracle® Enterprise Session Border Controller expects to see an SDP offer from the SIP endpoint in a provisional or reliable/provisional 200 OK, and then sends an answer in an ACK or PRACK.

With this parameter disabled (default), the Oracle® Enterprise Session Border Controller populates the SIP INVITE with SDP based on the media profiles applied to the ingress H.323 session agent or the IWF configuration.

IWF Codec Negotiation Configuration

To prevent the Oracle® Enterprise Session Border Controller from sending an SDP offer in the SIP INVITE for a call being translated between H.323 slow start and SIP:

1. In Superuser mode, type configure terminal and press Enter.

   ORACLE# configure terminal
   ORACLE(configure)#

2. Type session-router and press Enter.

   ORACLE(configure)# session-router
   ORACLE(session-router)#

3. Type iwf-config and press Enter.

   ORACLE(session-router)# iwf-config
   ORACLE(iwf-config)#

4. slow-start-no-sdp-in-invite—Enable this parameter if you want to prevent the Oracle® Enterprise Session Border Controller from sending an SDP offer in the SIP INVITE for an IWF call initiated in H.323 slow start (being translated to SIP). The default is disabled. Valid values are:

   • enabled | disabled

5. Save and activate your configuration.