[asterisk-users] how can qualify=yes trigger some external event?

[Anthony Francis]

Watkins, Bradley wrote:
>> -----Original Message-----
>> From: asterisk-users-bounces at lists.digium.com 
>> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
>> Ricardo Carvalho
>> Sent: Friday, June 01, 2007 6:04 AM
>> To: Asterisk Users Mailing List - Non-Commercial Discussion
>> Subject: [asterisk-users] how can qualify=yes trigger some 
>> external event?
>>
>> Hi all,
>>
>> The option qualify=yes allows Asterisk to check if it can 
>> reach the peer. If the device does not answer within the 
>> time-out period, Asterisk considers the device off-line for 
>> future calls.
>> Is it possible to use this feature to trigger some external 
>> event, in case of failed reply from the peer that is tried to 
>> be reached? How can that be done?
>>
>> Regards,
>> Ricardo.
>>
>>     
>
> Hi, Ricardo.
>
> Currently there is no way to do this in a pure "configuration-only" sort
> of way.  However, if you're even moderately adept at C a cursory glance
> through chan_sip.c will show that it would be quite straightforward to
> modify the code in order to allow this.
>
> Regards,
> - Brad
>
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qualify=yes generates events that can be viewed from AMI, they are:
'Event: PeerStatus'
'PeerStatus: Lagged'

'Event: PeerStatus'
'PeerStatus: Reachable'

The other fields give the peer name and like, for more details view the 
chan_sip.c source, the calls you are interested in there are to a 
function called manager_event().

I personally have an perl script that camps the AMI and alerts me when 
these events occur.