Type change system-parameters features. Press Enter.
On page 6 of the Feature-Related System-Parameters screen, in the Public Network Trunks on Conference Call field, type a number between 0 to 5, or 11.
Note:
If you set the Public Network Trunks on Conference Call field to 0, the system does not display the Conference Parties with Public Network Trunks field.
In the Conference Parties with Public Network Trunks field, type a number between 3 to 6, or 12.
In the Conference Parties without Public Network Trunks field, type a number between 3 to 6, or 12.
