ZTA03492:BSCRPT_KPI_VBS_DL_TRAF_ERL
This measurement provides the ratio of the number of busy VBS downlink TCH to the number of attempts to scan channel states. This counter indicates the frequency of seizing the downlink VBS TCHs in the BSC.
Erl.
At the end of each granularity period, this counter is measured by using the following formula. For details, see the related formula.
Traffic Volume of VBS Downlink TCH per BSC = Number of Busy VBS Downlink TCH per BSC/Number of Attempts to Scan Channel States per BSC