Conference Bridge CallManager

Hi,

I want to configure an hardware conference bridge in a CallManager. My conference bridge will be a module NM-HDV-1E1 in a 3640 cisco router.

The problem is that we must write the MAC address of the device to configure a conference bridge. But there is no IP address on an E1 controller or on the NM-HDV module, actually I think. If I’m wrong, where could I find it.
In the other case, how could I do?

Thanks for your answers.

Jean-Philippe from France