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 chan_dahdi.so 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 .