hy, we use a max-tnt with ... { shelf-1 slot-1 0 } UP 4ether2-card { shelf-1 slot-4 0 } UP 8e1-card { shelf-1 slot-5 0 } UP csmx-card { shelf-1 slot-6 0 } UP csmx-card { shelf-1 slot-7 0 } UP csmx-card { shelf-1 slot-8 0 } UP csmx-card { shelf-1 slot-9 0 } UP csmx-card { shelf-1 slot-16 0 } UP hdlc-card now we want to realize 64 and 128k nailed connection with a p50, the telco gave us two timeslots (5 and 6). the connection run without problems if we use only one channel. if we connect with to channels we got a lot of crc (bad blocks). i have no idea how we can fix the problem. it could be that is a problem of the telco but they told me all the connections on the telco-side running well. the max-tnt run with Software version 7.0.26. the telco used bosch and a ntpm from quante. i hope someone can halp me. mfg michael