Hi Bahman,
Here is the info for setting up Dial 0 for Operator assistance;
About Operator Assistance
Cisco Unified MeetingPlace Express can be configured to forward calls to the attendant or help desk in the following situations:
Caller dials 0 for operator assistance.
Caller does not enter a number at a voice prompt.
Step 1 Log in to Cisco Unified MeetingPlace Express.
Step 2 Click Administration at the top of the page.
Step 3 On the left side of the page:
a. Click System Configuration.
b. Click Usage Configuration.
Step 4 In the Usage Configuration page, configure the following fields:
Dial attendant on timeout Set this field to Yes.
Attendant phone Enter the help desk or attendant phone number.
http://www.cisco.com/en/US/products/ps6533/products_administration_guide_chapter09186a0080579c23.html#wp1053889
As far as a time setting for Reservationless Meetings;
Reservationless meetings *begin immediately* and without any user-entered meeting details. Reservationless meetings are useful for impromptu meetings, but the meeting owner has far less control of the reservationless meeting parameters than with scheduled immediate meetings.
The following special characteristics apply to reservationless meetings:
Both profiled and unprofiled users may join a reservationless meeting.
After the first person joins a reservationless meeting, the meeting gets publicly listed in the Find Meeting page of the end-user web interface. The meeting subject displays the meeting owner's last name.
The meeting ID for a reservationless meeting is the phone profile number of the meeting owner.
The meeting owner is the user who sets up the reservationless meeting by performing the following actions:
Clicks Start Reservationless on the end-user web interface.
Logs in to the system, if not already logged in.
Clicks Join Meeting or Start Meeting Without Me.
Reservationless meeting IDs are permanently reserved and cannot be used for scheduled meetings.
E-mail notifications are not sent for reservationless meetings.
Participants who join a reservationless meeting before the owner does must wait in a waiting room (where they cannot communicate with each other) until the meeting owner arrives, unless one of the following is true:
The meeting owner clicks the "Start Meeting Without Me" button on the Reservationless Meeting page of the end-user web interface.
The system administrator sets the Reservationless: Allow 3rd Party Initiate field to Yes, and a profiled user starts the meeting
http://www.cisco.com/en/US/products/ps6533/products_administration_guide_chapter09186a0080579c3a.html#wp1042831
Hope this helps!
Rob
