[asterisk-users] NAT problem with recvonly calls

[Dovid Bender]

David,

You should be able to do that via the agi as well.

On Wed, Dec 2, 2020 at 20:32 David Cunningham <dcunningham at voisonics.com>
wrote:

> Hi Dovid,
>
> We're using Enswitch so it uses AGI rather than a regular Asterisk
> dialplan, but perhaps sending it to a custom-made Asterisk context with the
> lines you suggest could be the best way forward.
>
> Thank you for that.
>
>
> On Thu, 3 Dec 2020 at 13:01, Dovid Bender <dovid at telecurve.com> wrote:
>
>> David,
>>
>> Does Asterisk send a 180 or a 183 with SDP? We have found that using
>> these two lines help (where xc is a 500ms blank sound file)
>> Exten => _X.,n, Progress()
>> Exten => _X.,n, Playback(xc,noanswer)
>>
>>
>> On Wed, Dec 2, 2020 at 4:30 PM David Cunningham <
>> dcunningham at voisonics.com> wrote:
>>
>>> Hello,
>>>
>>> We have a  problem with a SIP doorbell device which sends media one way
>>> only, and NAT at the receiving device.
>>>
>>> When the doorbell button is pressed it makes a call to a configured
>>> destination. Since the doorbell only sends and doesn't receive it sends the
>>> INVITE with sendonly in the SDP, and the destination then replies with a
>>> 200 OK with recvonly in the SDP.
>>>
>>> The problem is that the destination is behind NAT, and its reply
>>> contains a private network IP in the SDP. Normally Asterisk when nat=yes
>>> works around that by adjusting the destination for RTP to be the address it
>>> actually receives audio from, however because this device is recvonly
>>> Asterisk never receives audio from it. This means Asterisk keeps trying to
>>> send the doorbell's RTP to the private network IP which of course fails,
>>> and the destination never gets the RTP from the doorbell.
>>>
>>> Does anyone know how to work around this issue?
>>>
>>> Thank you in advance,
>>>
>>> --
>>> David Cunningham, Voisonics Limited
>>> http://voisonics.com/
>>> USA: +1 213 221 1092
>>> New Zealand: +64 (0)28 2558 3782
>>> --
>>> _____________________________________________________________________
>>> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>>>
>>> Check out the new Asterisk community forum at:
>>> https://community.asterisk.org/
>>>
>>> New to Asterisk? Start here:
>>>       https://wiki.asterisk.org/wiki/display/AST/Getting+Started
>>>
>>> asterisk-users mailing list
>>> To UNSUBSCRIBE or update options visit:
>>>    http://lists.digium.com/mailman/listinfo/asterisk-users
>>
>> --
>> _____________________________________________________________________
>> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>>
>> Check out the new Asterisk community forum at:
>> https://community.asterisk.org/
>>
>> New to Asterisk? Start here:
>>       https://wiki.asterisk.org/wiki/display/AST/Getting+Started
>>
>> asterisk-users mailing list
>> To UNSUBSCRIBE or update options visit:
>>    http://lists.digium.com/mailman/listinfo/asterisk-users
>
>
>
> --
> David Cunningham, Voisonics Limited
> http://voisonics.com/
> USA: +1 213 221 1092
> New Zealand: +64 (0)28 2558 3782
> --
> _____________________________________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> Check out the new Asterisk community forum at:
> https://community.asterisk.org/
>
> New to Asterisk? Start here:
>       https://wiki.asterisk.org/wiki/display/AST/Getting+Started
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20201202/5b95e522/attachment.html>