[asterisk-users] how to avoid call waiting? Or check DIALSTATUS before Dial()?

[sean darcy]

Rilawich Ango wrote:
> Can you try to disable call waiting in your phone?
> 
> On Fri, May 15, 2009 at 6:44 AM, sean darcy <seandarcy2 at gmail.com> wrote:
>> sean darcy wrote:
>>> I have two internal analogue extensions off a TDM400P. If the first is
>>> busy, I'd like to ring the second. So:
>>>
>>> [incoming]
>>> exten =>s,1,Answer()
>>> exten =>s,n,Dial(${mainline},60)
>>> exten =>s,n,ExecIf($["${DIALSTATUS}" = "BUSY"]?Dial(${secondline},30))
>>>
>>> But it doesn't work because * first tries Call Waiting on the main line.
>>> Here I dial out:
>>>
>>>      -- Starting simple switch on 'DAHDI/1-1'
>>>      -- Executing [140 at internal:1] Answer("DAHDI/1-1", "") in new stack
>>>      -- Executing [140 at internal:2] Set("DAHDI/1-1", "CALLERID="house"
>>> <2127873453>") in new stack
>>>      -- Executing [140 at internal:3] Dial("DAHDI/1-1",
>>> .............................
>>>
>>> And now an incoming call:
>>>
>>>      -- Executing [s at incoming:1] Answer("IAX2/nhi-10929", "") in new stack
>>>      -- Executing [s at incoming:2] Dial("IAX2/nhi-10929", "DAHDI/1,60") in
>>> new stack
>>>      -- Called 1
>>>      -- IAX2/nhi-10929 requested special control 20, passing it to DAHDI/1-2
>>>      -- IAX2/nhi-10929 requested special control 20, passing it to DAHDI/1-2
>>>      -- IAX2/nhi-10929 requested special control 20, passing it to DAHDI/1-2
>>>      -- DAHDI/1-2 is ringing
>>>      -- IAX2/nhi-10929 requested special control 20, passing it to DAHDI/1-2
>>>      -- IAX2/nhi-10929 requested special control 20, passing it to DAHDI/1-2
>>>      -- CPE supports Call Waiting Caller*ID.  Sending 'Seandarcy/212 573
>>> 1432'
>>>
>>>
>>> Is there a way to check the status of a dahdi channel _before_ dialing it?
>>>
>>> exten =>s,n,ExecIf($["DAHDI/1${DIALSTATUS}" =
>>> "BUSY"]?Dial(${secondline},30)) ??
>>>
>>> What's special control 20  ??
>>>
>>> Any help appreciated.
>>>
>>> sean
>>>
>> BTW, this is on 1.6.1.
>>
>> sean
>>
>>
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> 

How? It's only an analogue extension.

sean