[asterisk-users] Dial() function

[Albert]

Hello everybody,

Can someone explain [gGrR] in Dial() function?

To dial external extension 18005551212 over channel 2 we will use:
Dial(DAHDI/2/18005551212)

To dial external extension 18005551212 over one of channel from group of
channels (nr 2) we will use:
Dial(DAHDI/g2/18005551212)

So lets assume that group 2 consists of 5 channels. How does Dial()
function choose channel:
- randomly?
- first free?

What mean another params: G, R, r ?

Thanks for clearing this up for me,

Albert
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