I'm setting up my 1st Cisco router: a 2801 & 1 port VWIC2 t1 card. The t1 is also different from the rest of our point-to-point t1s. It only has channels 9-24. Checking configs I saw the channel-group command. Someone told me this is only to be used with CAS t1s and I need to know if the t1 is CAS or PRI. I thought PRI is only voice? I need this for data. I also thought if channel 24 is in use then it cannot be PRI. I called the telco who were little help. How can I know what type of PRI I have and where can I find the best documentation for setting this up?