Open RTMT->Performance->YOur CCM-> Cisco H323 (or MGCP, depends on what you are using)-> Double Click Call Active-> select Gateways you have-> you will now have a graph showing the number of all B Channels used, right click on it select-> Alert / Treshold-> Enable Alert (Severity: Warning-> Click Next: on "trigger alert when the following condition meet" select a Value ie Over 1 (which means when 1 B channels are simultanueously used= 1Call-> you will get an email alert of it). Do this for all Gateways and all Callmanager processing Calls. You will be flooded with email alerts, which will tell you how much Bchannels are used, archivate that and use it.
Also under CCm webadmin page-> Application->Tools->Serviceability report Archive
a report about Gateway utilization (although not simulaneusly but in 15min interval).
Last but not least User CDR (Gateway utilization).
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...