RM3173: CELL_LOOP_START_FAIL_DROPS_TCHF
After the MS seizes a channel, the local switching is started. This measurement is triggered each time a call on the TCHF drops due to the failure in starting the local switching caused by different reasons. The cause value can be Terrestrial Resource Request Failure, Failures on the BTS Side, or Timer Expired.
Integer number or integer.
At the end of the granularity period, the value of this counter is calculated according to the following formula.
Call Drops Due to Loopback Start Failure (TCHF) =
[Call Drops on TCHF Due to BSC Loopback Start Failure (Territorial Resource Request Failure)] +
[Call Drops on TCHF Due to BSC Loopback Start Failure (Other Causes)] +
[Call Drops on TCHF Due to BTS Loopback Start Failure (Territorial Resource Request Failure)] +
[Call Drops on TCHF Due to BTS Loopback Start Failure (Failures on the BTS Side)] +
[Call Drops on TCHF Due to BTS Loopback Start Failure (Other Causes)]