Yes, we can modify the number of active lines that are sending at once.
For example, if a destination device is an older fax machine that can only handle 1 fax at a time, we can set the concurrency rate to 1 for the number.
Another example is if the destination number is a national fax line, we can increase the concurrency rate to a higher number (i.e. 16). This means that 16 faxes can be sent to that number from our system at the same time.