[asterisk-users] AMD with analog lines - DIALSTATUS empty

[Richard Mudgett]

On Fri, Mar 28, 2014 at 4:01 AM, Administrator TOOTAI <admin at tootai.net>wrote:

> Hello,
>
> I would like to use AMD on outgoing calls using analog line. I tested with
> SPA3102 and cisco2811 as gw and asterisk 1.8.26.1 as well as 11.8.1 Other
> end is analog number behind another cisco/asterisk, also tested calling a
> mobile number with the same result.
>
> What I did: dial is done like exten => s,n,Dial(SIP/<IP gw>/<dialed
> number>,,M(myMacro)), which tell Asterisk to execute myMacro when the call
> is answered by calling party.
>
> [myMacro]
>
> exten => s,1,NoOP(Executed when call is answered)
>  same => n,AMD()
>  same => n,NoOp(Dial status=${DIALSTATUS})
>  same => n,NoOp(AMD status=${AMDSTATUS} cause=${AMDCAUSE})
>  same => n,MacroExit()
>
> Problem is that [myMacro] is executed as soon as the call is going out
> from the gw (cisco or linksys) and before called party answered. DIALSTATUS
> is empty (should be ANSWER), AMDSTATUS=NOTSURE and AMDCAUSE=TOOLONG-5000
> which seems OK as DIALSTATUS isn't reliable.
>
> The same dialplan using a SIP trunk is working as expected.
>
> So question is, why, when using analog line, I dont get the right behavior.
>
> Thanks for any hint
>

Analog lines don't have a reliable way to know when the far end actually
answers.  Polarity
reversals could signal when the far end actually answers, but it isn't
normally available or
standardized.  Thus, the line is considered answered when dialing is
complete.

Richard
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