how to set a quota bandwidth of 1 gb / person with 1mbps speed, but after quota 1 gb / person expires, the rate dropped to 1kbps ...?
please answer to the master...!!

pls follow the both link for your answer.

http://forum.mikrotik.com/viewtopic.php?f=10&t=64894

http://forum.mikrotik.com/viewtopic.php?f=9&t=70260


Best regards