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Reply To: reasons for tch drop rate


hello friends

there are drop calls in all the sites ,with lost TCH radio link,lost sdcch radio link
when checked in OMC-R report

please let me know what i need to do, do i have to perfofm Drive test and check log files.

national call in the network are free, if the duration of calls exceed 20 minutes ,the MSC drops the call.

can i relate this reason for lost TCH and SDCCH radio link.

please advise