UPDATE Interworking

The Oracle Communications Session Border Controller can be configured to convert UPDATE methods (with or without SDP) to INVITE methods inside a dialog that has already been established. SDP is inserted when the UPDATE message doesn’t have it. The method is modified from UPDATE to INVITE for the duration of an UPDATE based transaction and the SBC creates an ACK message to acknowledge the INVITE response.

You must specify the new sip-interface option update-interworking on the ingress SIP interface to enable the UPDATE Interworking feature. The three possible scenarios are described as follows:

Successful UPDATE with SDP

In this example the original UPDATE contains SDP, and the INVITE is sent with SDP.

This image displays a successful interworking update with SDP.

Successful UPDATE without SDP

In this example the original UPDATE does not contain SDP, SDP is inserted and the INVITE is sent with SDP. SDP is stripped from 200OK/UPDATE on the “A” (ingress) side.

This image displays a successful interworking update without SDP.

UPDATE Failure

In this example the original UPDATE contains SDP, and the INVITE is sent with SDP.

UPDATE Interworking Configuration

Access the sip-interface configuration element.

ORACLE# configure terminal
ORACLE(configure)# session-router
ORACLE(session-router)# sip-interface
ORACLE(sip-interface)#

Select the sip-interface object to edit.

ORACLE(sip-interface)# select
<RealmID>:
1: realm01 172.172.30.31:5060

selection: 1
ORACLE(sip-interface)#

options — Set this parameter by typing options, a Space, the option name update-interworking with a plus sign in front of it, and then press Enter.
```
ORACLE(sip-interface)# options +update-interworking
```
If you type options and then the option value without the plus sign, you will overwrite any previously configured options. In order to append the new option to this configuration’s options list, you must prepend the new option with a plus sign as shown in the previous example.
Type done to save your configuration.