[Freeswitch-users] SNMP or Cacti to graph perrformance?

Hi List, I have searched and searched and have found nothing. Id like to be able to keep track of current calls and the CPS and then chart these via Cacti. Is their some a SNMP plugin that I have not seen for FS that can do some of these things? Also, if I have to make some custom plugin that montiors output the of show channels /show calls via one of the API's, anyway we can get a realtime stream so I don't have to query it every second to get correct data? Thanks!