Type 6 : Repeat Loop

 ┌────┬──┬──┬──┬───┬───┐
 │ 06 │ BLKLEN │ COUNT │
 └────┴──┴──┴──┴───┴───┛

 This sub-block specifies the beginning of a repeat loop. The data
 sub-blocks between this block and the next End-Repeat Loop sub-block is
 repeated by the CT-VOICE driver for (COUNT+1) times.

 The COUNT (2 bytes) field takes a value from 1 to FFFE hex as a loop
 count. If COUNT is FFFF hex, then it is to be an endless loop. In this
 case, refer to the following section Reference fir SBC Voice functions on
 how to break out of the endless loop.

 The BLKLEN field is always 2.