[asterisk-dev] SIP Multiple endpoints with same id

[Volkov Alexei]

That is I actually means when first posting this thread, thanks Luigi 
describing it from another point of view.
> On Wed, Nov 08, 2006 at 11:13:47AM -0600, Kevin P. Fleming wrote:
>   
>> Luigi Rizzo wrote:
>>     
>>> The not-so-easy part (to me at least) is how to make this dynamic
>>> - e.g. buy a new _device_, configure with appropriate credentials,
>>> and have it dynamically (i.e. as it registers/unregisters)
>>> linked to a certain extension together with
>>> the other devices in the group without having to modify the dialplan.
>>>       
>> I have never understood this at all... if you need to modify the SIP
>> configuration to provide an entity with credentials for this device,
>> what is so hard about also modifying the dialplan?
>>     
>
> the example is the following.
>
> I buy service from a provider who gives me one account,
> say luigi443 (such a popular name!), and a phone number,
> say 4105552233 (i use two different strings, though in practice they
> tend to coincide and this is a huge source of confusion).
>  
> I configure my ATA at home to register with the provider, 
> which sees me as SIP/luigi443 (and in the dialplan, at
> 4105552233).
>  
> Anyways - say i move to some other place and want to register e.g.
> the softphone on my laptop on the provider (still as luigi443)
> while still keeping the phone at home registere, and
> have calls delivered to both places - this is key, because
> sometimes i don't have a chance to turn off the device
> i left on at home.
> Then i turn off the PC, and when the registration
> expires the provider doesn't ring me anymore, but the
> phone at home still keeps working.
>
> As asterisk works now, the new registration overwrites
> the old one, and if 2+ devices are active at
> the same time, there is going to be a fight between them.
>
> I am not expecting to have more than a handful of
> devices linked to the same extension, but surely don't
> want to remember many sets of credentials, nor,
> my provider wants to give me multiple accounts for free.
>
> As for implementing this:
> at the moment, as i understand it in chan_sip,
>  there is only one slot per peer (i.e. per credentials)
> to record the info.
> The dialplan has an entry so 4105552233 causes Dial(SIP/luigi443)
> to be called.
>
> If we could dynamically create multiple "registered-peer" entries for SIP/luigi443
> (that would be done in chan_sip), and introduce a new function func_howmanypeers()
> which could interrogate chan_sip (or any technology) returning the full
> list of entries matching SIP/luigi443 e.g. formatted as
> SIP/luigi443-0x332455&SIP/luigi443-0x3666&SIP/luigi443
> (which is good to be fed to Dial()), we could set a dialplan variable
> with that string and then call Dial().
>
> I think the changes required would be a new API call in the tech API,
> a minuscule function to run the call, and individual modifications
> to those technologies who support multiple peers (in the case of sip,
> i don't see huge changes).
>
> On the other hand, i don't see how to implement this with out
> a bit of help on the channel driver (unless we use different
> credentials for each phone, and have some function to do
> things like "sip show peers" from the dialplan).
>
> 	cheers
> 	luigi
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-- 
С уважением,
Волков Алексей

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