Number of Phone Numbers per Outgoing CALL File

Is it possible to place multiple phone numbers in a single outbound .call file? If I try doing this, only the last phone number in the file is called.

However, if I use 1 file per phone number, then Asterisk attempts to process all generated CALL files at once, incrementing the retry count for each that cannot be called because the designated channel is busy. For example if I have a list of 10 numbers and use 3 lines, the first three numbers will be process and the next 7 will have their retry increment bumped to 2. A few minutes later, the next 3 numbers are called and the remaining for are bumped to retry 3 and so on.