CSFB traffic and UMTS Original Traffic

[HEIN]

Hello Experts
Could I know the How to distinguish CSFB voice traffic and Normal original UMTS voice traffic in UMTS.
Please kindly let me know if available.

[agenov]

Hello Experts
Could I know the How to distinguish CSFB voice traffic and Normal original UMTS voice traffic in UMTS.
Please kindly let me know if available.

for which vendor? there are counters you can check based on RRC attempts with CSFB indicator, same for the traffic...eventually.