[asterisk-users] how to define a key to decline incoming call

[Stephen Bosch]

Anselm Martin Hoffmeister wrote:
> Am Donnerstag, den 17.05.2007, 10:40 +0200 schrieb asterisk at frameweb.it:
>> Hi all.
>> We have Snom phones which do have a defined key in order to drop incoming
>> call WITHOUT answering.
>>
>> Pressing that key, a "SIP/2.0 486 Busy Here" message is sent back.
>>
>> We have other phones (I.E. DECT Siemens C450IP, or ATCOM 320 or other)
>> which DO NOT have any key to do that (or the key does not work, as is with
>> Siemens C450 IP ): you have to answer and immediatly after hangup the call.
>>
>> Acting on feature.conf we succed in defining keys for blind transfer or
>> attended transfer: the last thing we need is the ability to drop an
>> incoming  call without answering it. Is there any way to define a key (or
>> double-key, i.e. "*4") to send back a  "SIP/2.0 486 Busy Here" message ?
>>
>> thanks in advance,
> 
> Please have a look at
> http://www.voip-info.org/wiki/view/Asterisk+Cmd+Dial
> 
> Especially the M() parameter. There is an "example 2" that needs only
> little changing to match your idea. You could, for example, wait 2 secs
> in that macro before bridging the calls - and reject call if "1" is
> pressed within 2 seconds, or similar.
> 
> Of course this prepends 2 seconds to any call bridging.
> 
> For the Siemens Gigasets, most of them (and I do not know the C450IP,
> only the C450) show a soft button "Ignore" which meens "stop ringing,
> but do not tell the caller". Combined with a Dial() timeout and
> following voicemail this works like "stop disturbing, eventually the
> voicemail will take the call". No idea about the ATCOM though, so having
> that Macro stuff might be the most universal method available.

Do these sets not have a "Do not disturb" button?

For sets that do, what is the behaviour when one presses the DND button
while the phone is ringing?

-Stephen-