existing version 4.2.

Unity stopped reading display name while playing default greeting. It plays  " sorry  is not available". No display name or ext just blank.  How can we restart the feature. Thanks

Is there compatibility table for selection of external antenna for out door access points. I would like to know if any of the Yagi antennas work with Aironet 1530E.

HelloWehave CUCM 6 which is going to be upgraded to version 9. I would like to know ifthere is any difference in the CDR output format of existing CUCM 6 with thenewer version. We want to make sure that our billing system will continue towork. Thanks