Can external users create voice conferences on the U1980

If the U1900 of V200R003 or later is used, see Configuration > Feature Guide > Voice Meeting in the U1900 product documentation .

Voice conference is a muti party call, it's depend on U19 series or U29 series Unified Gateway. Multimedia conference in addition to voice conference, it has screen sharing, whiteboard, text chat and video conference.Multimedia conference is depend on Unified Gateway and eSpace Meeting Server.

Only intra-office users can create conferences.

When a conference is scheduled on the U1900 voice gateway, the length of the conference ID can only be set to two or eight digits. The configuration details are as follows: Log in to the CLI, enter the config mode, and run the config confid length length command. (The value of the length parameter is 2 or 8. The default value is 8.) Usage guide The length of the conference ID entered when a user joins a conference must be the same as that set in the system. Example Run the config confid length two command to set the length of the conference ID to two digits. Note: The length of the conference ID can only be changed to two or eight digits.

Yes. You can add external numbers to the system blacklist or personal blacklist.