When you have two calls on the same line, it can sometimes be beneficial to include everyone in the same conversation. Then, when you’re done, you can break the calls apart again to conclude each one individually.
Conferencing two calls together
You can conference your current call and the call on hold together by dialing [*].
Breaking apart a conference call
When you are finished with the conference part of your call, you can break the two parties into separate calls again by pressing [Flash]. One call will remain active, and the other will be placed on hold.