You can create a conference room on demand and just specify the same Conf ID:
You can create a conference room which anybody can call into:
1. Dial the conference extension number “700“.
2. You will be requested to enter a conference ID followed by #. This can be any number, for example “1234” and will be the unique identifier (conference ID) for that specific conference session.
Note: The phone system requires a security PIN to create a call conference, you must enter it after the conference ID, separated by a *, for example: 1234*0000 (where 1234 is the unique conference ID and 0000 is the system wide conference PIN). The PIN is only required by the person setting the conference.
3. If you are the first participant, the conference will ask you to confirm creation of the new conference. Press * to confirm or # to cancel.
4. You will be asked to speak your name after the beep and press any button to continue.
5. All callers who wish to join the conference just dial (or get transferred to) extension “700” to enter the conference menu and then specify the same conference ID to join a conference (or enter a new ID to create a different conference).
6. You will now enter the conference. If you are the first caller, you will hear music on hold, while you wait for the other callers. As soon as another caller joins, their name will be announced.