Where the Echoes are identical, the subscriber unit restart the WER Timer (912) and execute the Update ARQ Status" process (914) as shown in FIG. 10 and as described below: The subscriber unit first checks the segment stored in the old-- ack queue (1002, 1004), which is also the segment being positively acknowledged by the WEI bit, to determine whether the segment is a DISC, MID, or FINAL segment