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Reply To: AMR,how to calculate erlangs


We have recently done trials on GSM AMR-FR but the results are not very encouraging.Not only the drop call rate has gone up by around 10%, there is a slight decrease in total traffic in the cell and Erlangs minute per drop has gone down as well.
I know that this increase in drop call rate is a known problem due to diffrence in AMR speech codec and signalling (SACCH)performance, which may suggest why we have seen drop in traffic levels.

Can anyone share his/her experience on this?