I am working on an issue with a PRI I have. I have and Adtran 550 between the Telco and my Nortel CS1000. I am going to be getting two new PRI's in the near future and they will be set to NI2. The current switch typ is dms100 for both PRI's. With the adtran 550 I can have one protocol coming in and a different going out, so I configured one of my PRI's with NI2 on the adtran 550 and on the cs1000. When the PRI came up I could place outgoing calls but I could not recieve. I thought the problem may be with the adtran and the Ni2 set up, so I programed the pri back to dms100 and I end up with the same results. I can place a call but can not recieve. I must have missed something when I built the PRI. Can anyone give me a direction to look in?