Trunk side connects with the audio lines before they linked up with the PBX system and you can record everything that happens on the external lines. It works by recording all internal and external conversations. On the other hand, after the recording process also extends to extension internal calls.
Voice over internet protocol (VOIP) records by utilizing a SPAN/MIRROR port on a managed switch. The configuration of this port to copy all the audio traffic going through the switch and send it through this one port. This one port connected to the recorder PC. There are other ways to record VoIP, but this method is the most common.
PBX Monitor and Resource Monitor useful to monitor the performance of your PBX system. Observing the CPU and Memory will reveal the behavior of your phone system. PBX Monitor allows you to watch live conference, concurrent calls, trunk status, and extension status. You can learn more on this working with Basic Technologies Systems, the leading solution provider of EPABX System Dealer in Belgaum .