Hardware-based conference bridges are generally recommended over software conference bridges, as they support a larger range of codecs and free up server hardware for other tasks.
Note
IOS is Cisco's Internet Operating System, the technology that powers their routers and switches.
To configure an IOS conference bridge, perform the following:
Navigate to the Conference Bridge page (Media Resources | Conference Bridge).
Click on Add New to add a new conference bridge.
For the Conference Bridge Type* select Cisco IOS Enhanced Conference Bridge.
Specify the Conference Bridge Name. This is the name configured on the IOS device.
Select an appropriate Device Pool and Device Security Mode.
Set a Location if desired:
Click on Save.
Once the conference bridge has been configured on both the IOS device and on Unified Communications Manager, the conference bridge should show as registered.