Set flash time in Asterisk

Hai ,
I have set the flash=100 in chan_dahdi.conf file . How to check the flash time has been applied or not ?

That setting is read when DAHDI is loaded, it’s not configurable with reloads of Asterisk from the CLI. You’d have to restart Asterisk, or unload and then load from the CLI.

I have restarted DAHDI and asterisk . But asterisk has taken flash time as 750ms . Asterisk did not take new flash time .

So I desided to restart the machine . Then asterisk has taken new flash time .
flash = 100

So whenever, we are changing flash time , we have to restart the machine at once . This is for our information .