I think that the TFO doesn’t work with 5,15 because when we replace it with 4,75 the TFO success establishment was increased 4 times…
The problem with this replacement is that for some cells the RTC drop increased. When we disabled the TFO for this cell the RTC drop decrease to zero?? There is no relation between them, they are on different BSC and TC boards.
The TC counters C181d and C182 increased in the same time when the RTC drops occurs.
The basic problem is that when the TFO_NB is active the bitrate fluctuating and the voice interrupted!!!
Is possible that our release have a problem with TFO for AMR_NB? Do you know is thre somebody to activate this for B11.