16th December 2010 at 10:54
#35803
s
Guest
sdcch is a channel required for call steup after which u r allotted tch for the call. Hence if u hav got a tch and then it is dropped due to some reason it is a tch drop or a general call drop whereas when a call is dropped after sdcch has been got but tch not still allocated it is called a sdcch drop