Increased Data Traffic Vs. Dropped Calls This topic has 15 replies, 1 voice, and was last updated 11 years ago by mah. Viewing 16 post (of 16 total) ← 1 2 Author Posts 12th December 2013 at 08:07 #68130 mahGuest to Jun. The total number of DL TBFs that can be reserved is limited by the number of Temporary Flow Identity (TFIs) available in downlink direction. There is a limit of 32 TFIs per PSET on the downlink Author Posts Viewing 16 post (of 16 total) ← 1 2 The forum ‘Telecom Design’ is closed to new topics and replies.