Hi Flo
For AMR implementation, Nokia recommends:
1.- DL DTX should be Active in BSC (DOWNLINK DTX… YES)
2.- DL DTX should be turnned off in ET-PCM from TCSM.
3.- DL DTX should be OFF in MSC side in each cell (DOWNLINK DTX DISABLED BY MSC ….OFF)
I hope this helps you.
BR