Explanation/Reference:
Explanation: The auto attendant's menu displays a list of all permanent conferences and any conference
that is scheduled to take place at this time. Conferences are listed alphabetically by name.
Select your conference using either FECC or DTMF navigation.
If you do not see the conference that you want to join, verify the conference name, start time, and that your
system adminstrator has enabled the conference on the auto attendant. If your conference does not
appear on the auto attendant and you know the conference ID, you can type in the conference ID followed
by hash/pound (#) to join the conference.
Reference: http://www.cisco.com/c/dam/en/us/td/docs/telepresence/infrastructure/mcu/user_guide/
Cisco_MCU_Accessing_Conferences_Getting_Started.pdf