[asterisk-users] How to detect a PSTN telephone is busy or not?

[ABBAS SHAKEEL]

Hello,

Please have a look to DIALSTATUS variable. here
http://www.voip-info.org/wiki/view/Asterisk+variable+DIALSTATUS

<http://www.voip-info.org/wiki/view/Asterisk+variable+DIALSTATUS>I hope it
helps



On Thu, Mar 18, 2010 at 1:31 PM, Zhang Shukun <bitzsk at gmail.com> wrote:

> hi,all
>
> one problem confuse me these days. i want to sequence dial three PSTN
> number(a,b,c)
>
> first, if i dial number a, if a is busy , i will dial number b. if b
> is busy, i will dial number c.
>
> Dial(SIP/a at IP,30)
> Dial(SIP/b at IP,30)
> Dial(SIP/c at IP,30)
>
> i want to know before i dial number a, how to know if a is busy now?
>
> if a is busy now. i will not dial a, instead, i will dial number b
> directly.
>
> to summary is : in asterisk, how to detect a pstn telephone number is
> busy or not before dialing it?
>
> Thanks!
>
> --
> Best regards,
> Sucan
>
> --
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-- 
Best Regards
Shakeel Abbas
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