[asterisk-users] Discover Asterisk 1.4 :: SIP Subscriptions

[Johansson Olle E]

16 jan 2008 kl. 00.03 skrev Tilghman Lesher:

> On Tuesday 15 January 2008 16:03:16 Andrea Spadaccini wrote:
>> Russell wrote:
>>> Andrea wrote:
>>>> I have a small question: other than a phone (ie. SIP/something),  
>>>> what
>>>> else can I use as "app"? Can I handle the change via some custom  
>>>> code?
>>>
>>> There are a number of things that can provide "device state" in  
>>> Asterisk.
>>> That includes "real" devices such as SIP endpoints, or any other  
>>> channel
>>> driver. However, it also includes things like monitoring the state  
>>> of a
>>> space in parking, or the usage of a MeetMe conference.  I have also
>>> written a small dialplan function which lets you create custom  
>>> device
>>> states.  A lot of people use this for things like having a light  
>>> on the
>>> phone that reflects whether the agent is logged in or not.
>>>
>>> More information:
>>>
>>> http://asterisk.org/node/48325
>>> http://asterisk.org/node/48360
>>
>> Thanks a lot for the info, I already read the first article, and  
>> it's great
>> to know that DEVSTATE can be used in 1.4.
>>
>> But my question was different, my poor english doesn't help me. :(
>>
>> In your article I read
>> "For example, when someone subscribes to the state of extension
>> 1234, Asterisk knows to give them the state of the SIP phone SIP/ 
>> myphone.
>>
>> exten => 1234,hint,SIP/myphone"
>>
>> Suppose that I want to write to a database the state of all my  
>> extensions,
>> in order to display it in a web page.
>>
>> How could I do it using the hint mechanism?
>
> Just create a module that subscribes to every single device and when  
> the state
> changes, your callback will get an event with the device name that  
> changed.
> You could then update your database with an SQL query (or whatever  
> else you
> like).

The manager interface is our preferred connection to Asterisk from  
third-party
modules. The AMI will report all device state changes, so you can  
create an
app that updates your database based on this information.

/Olle