Does anyone have any suggestions for a reporting tool or process to get trunk utilization? For example I have X amount of SIP channels from my provider and am trying to just keep tabs on when I might need to purchase more.
Enable SNMP in Asterisk and query your number of channels in use every minute. Granted this is easier if you have a monitoring infrastructure already in place, but as it’s a simple counter you can use things like MRTG to track the numbers.