This read-only counter tallies the number of complete AAL5 frames (as opposed to individual cells) that have been transmitted onward to the network from this channel. Admins use this frame-level counter to understand traffic in terms meaningful to upper-layer applications, useful when correlating with frame-discard counters like chanEpdDiscCells and chanPpdDiscCells to compute an effective frame-loss rate rather than just a cell-loss rate. For example, comparing the growth of chanIngrXmtAAL5Frames against the sum of discarded-frame events would let an admin estimate what percentage of application-level frames actually got through successfully.