How This Equations Exactly Work ??

hello;

i have mikrotik server installed on rb 450g ,i saw in ppp>>>profiles>>>rate limit

the following equation " formula" which is in the red rectangular,as shown below





what i can under stand is 400k is the first rate the client receive for rx & tx

after some time the rate will decrease to 250k for rx & tx and still to this limit for 8 sec

after that the rate will be fixed to 300k for rx & tx.

this is what i think, but what the benefit of the other numbers i do not know ,and am not sure how much correct what i said above about the formula and how it work.

if there is anyone can explain to me what the formula mean & how it work exactly i will be grateful.


my best regards.

Order of the values: http://wiki.mikrotik.com/wiki/Manual:RADIUS_Client#Access-Accept

Mikrotik-Rate-Limit - Datarate limitation for clients. Format is: rx-rate[/tx-rate] [rx-burst-rate[/tx-burst-rate] [rx-burst-threshold[/tx-burst-threshold] [rx-burst-time[/tx-burst-time] [priority] [rx-rate-min[/tx-rate-min]]]] from the point of view of the router (so “rx” is client upload, and “tx” is client download). All rates should be numbers with optional ‘k’ (1,000s) or ‘M’ (1,000,000s). If tx-rate is not specified, rx-rate is as tx-rate too. Same goes for tx-burst-rate and tx-burst-threshold and tx-burst-time. If both rx-burst-threshold and tx-burst-threshold are not specified (but burst-rate is specified), rx-rate and tx-rate is used as burst thresholds. If both rx-burst-time and tx-burst-time are not specified, 1s is used as default. Priority takes values 1..8, where 1 implies the highest priority, but 8 - the lowest. If rx-rate-min and tx-rate-min are not specified rx-rate and tx-rate values are used. The rx-rate-min and tx-rate-min values can not exceed rx-rate and tx-rate values.

What that means: http://wiki.mikrotik.com/wiki/Manual:Queue