$ETA: Queued Callers Estimated Time to Answer
If used in a prompt list, will speak the callers ETA, eg. "Your estimated time to answer is 5 minutes." If used elsewhere, such as in a condition, returns the ETA in minutes as a numeric value.
$POS: Queued Callers Queue Position
If used in a prompt list, will speak the caller's queue position, eg. "You are in queue position 2." If used elsewhere, such as in a condition, returns the caller's queue position as a numeric value.