System information

Figure 24-2 shows a graph of active channels of a specific type. In this case, we’re
looking at how many DAHDI channels are active on the system. Monitoring DAHDI
channels is particularly interesting, since DAHDI channels are generally mapped to
physical resources, and a predefined number of channels are available. It would be very
useful to monitor DAHDI channel utilization and get notified when usage passes a
particular threshold, as this might be a signal that additional capacity needs to be added.
Figure 24-2. Graph of active DAHDI channels
Finally, Figure 24-3 shows network interface utilization. As you can see, there were
spikes in the traffic flowing into and out of the system when SIP calls were in progress.
Figure 24-3. Graph of traffic on a network interface
Conclusion
Asterisk is very good at allowing you to keep track of many different facets of its op-
eration, from simple call detail records to full debugging of the running code. These
various mechanisms will help you in your efforts to manage your Asterisk PBX, and
they represent one of the ways in which Asterisk is vastly superior to most (if not all)
traditional PBXs.
Conclusion | 559