REFER Pass-Through Call (REFER handled by User Agent)
The following illustration shows a REFER pass-through call using selective recording and the User Agent (UA) handling the REFER on the call. Recording is required in this call flow.
| Call Flow Description | |
|---|---|
| 1 - UA-A sends INVITE to Oracle® Enterprise Session Border Controller. | 18 - UA-C responds with OK to Oracle® Enterprise Session Border Controller. |
| 2 - Oracle® Enterprise Session Border Controller forwards INVITE with SDP Offer and metadata to SRS. | 19 - Oracle® Enterprise Session Border Controller forwards OK response to UA-B. |
| 3 - SRS responds with OK to Oracle® Enterprise Session Border Controller. | 20 - Oracle® Enterprise Session Border Controller sends NOTIFY with OK reponse to UA-A. |
| 4 - Oracle® Enterprise Session Border Controller sends INVITE to UA-B. | 21 - Oracle® Enterprise Session Border Controller sends re-INVITE to SRS with new SDP and metadata, adds participant C, stops participant A . |
| 5 - UA-B responds with OK to Oracle® Enterprise Session Border Controller. | 22 - SRS responds with OK to Oracle® Enterprise Session Border Controller. |
| 6 - Oracle® Enterprise Session Border Controller sends re-INVITE with SDP and metadata changes to SRS. | 23 - UA-A sends BYE to Oracle® Enterprise Session Border Controller. |
| 7 - SRS responds with OK to Oracle® Enterprise Session Border Controller. | 24 - Oracle® Enterprise Session Border Controller responds with OK to UA-A. |
| 8 - Oracle® Enterprise Session Border Controller forwards OK response to UA-A. | 25 - Oracle® Enterprise Session Border Controller responds with OK to UA-A. |
| 9 - RTP stream initiated between UA-A and Oracle® Enterprise Session Border Controller. | 26 - RTP stream initiated between Oracle® Enterprise Session Border Controller and UA-B. |
| 10 - RTP stream initiated between Oracle® Enterprise Session Border Controller and UA-B. | 27 - RTP stream initiated between Oracle® Enterprise Session Border Controller and UA-C. |
| 11 - RTP stream initiated between Oracle® Enterprise Session Border Controller and SRS. | 28 - RTP stream initiated between Oracle® Enterprise Session Border Controller and SRS. |
| 12 - UA-A sends REFER-TO: C to Oracle® Enterprise Session Border Controller. | 29 - UA-C sends BYE to Oracle® Enterprise Session Border Controller. |
| 13 - Oracle® Enterprise Session Border Controller forwards REFER-TO: C to UA-B. | 30 - Oracle® Enterprise Session Border Controller responds with OK to UA-C. |
| 14 - UA-B responds with 202 ACCEPTED to Oracle® Enterprise Session Border Controller. | 31 - Oracle® Enterprise Session Border Controller sends BYE to UA-B. |
| 15 - Oracle® Enterprise Session Border Controller forwards 202 ACCEPTED to UA-A. | 32 - UA-B responds with OK to Oracle® Enterprise Session Border Controller. |
| 16 - UA-B sends INVITE TO: C to Oracle® Enterprise Session Border Controller. | 33 - Oracle® Enterprise Session Border Controller sends BYE to SRS |
| 17 - Oracle® Enterprise Session Border Controller sends INVITE to UA-C. | 34 - SRS responds with OK to Oracle® Enterprise Session Border Controller. |
