UMTS CSFB Traffic and Original Traffic

[HEIN]

Dear Experts
Could I know How distinguish CS traffic from csfb and UMTS original CS traffic?If you have idea please kindly let me know

[mashi123]

speaking of huawei , AFAIK no seperate counter for erlangs of csfb users or AMR csfb users , but there are counters for the number of csfb amr connections and number of rab attempts for csfb connection
so if you donot care about too much accurate numbers , the below formula can give you an approximate estimation of the cs traffic generated by csfb users
total cs traffic in 3G * (number of cs rab attempts by csfb users / number of total cs rab attempts )