We have several TC chassis with quad modems that we want to convert to PRI. One of chassis has a DSP (2.1.9) card that works fine with a PRI. They all have HyperArc with 5.0.99 software. The process I went through on a chassis was to load the current PRI software on the T1/PRI card, and set the trunk setting b8zs,esf, switch type 5ess, (although I believe they have a CTI switch). The other settings match (dnis,eandmtypeII, wink, etc) the CT1 settings. Then on the Quad modems I set the "Line Interface Source" from t1Tdm to priTdm. Save and reboot. When everything is connected, I have all green lights, and the switch guy sees the d channel come up. When we dial into that line, the switch guy sees the call come in on the first trunk but the modem doesn't answer. I don't see any lights flash on the modem card to indicate a call coming in. The default config on the PRI card is round robin allocation of modems as opposed to fixed assignment which I didn't change. The DSP card is using fixed assignment routing. If the switch guy converts it back to a CT1, and I load the CT1 software back in, and switch the line interface source on the quad cards, then it works fine. Can anyone tell me what I am missing, or point me in a direction to look? Thanks. Randy McMillan PacInfo - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.