The replaces header is used in SIP call control applications. The Replaces header is used to logically replace an existing SIP dialog with a new SIP dialog. This can be used to enable a variety of features, for example: "Attended Transfer" and "Call Pickup".
For some platforms, the behavior needs to be changed. We have seen the following issues where the setting needed to be changed.
- Unattended transfer, the call is signaled as 2e incoming call.
- Group call pick-up