[Freeswitch-users] Send extra custom info (image data) on call to show in target endpoint

Ghulam Mustafa mustafa.pk at gmail.com
Sat Mar 14 13:03:48 UTC 2020

You can send image uri as a custom sip header

<action application="set" data="sip_h_X-DisplayPicture=

On Fri, Mar 13, 2020 at 5:05 PM Jose David Jurado Alonso <
josedavid at zennio.com> wrote:

> Hi,
> I'm looking for a way to be able to pass extra information (one image data
> for example) in a call.
> The purpose is to be able to display a preview image of the caller on the
> target device (mobile) so that they can see it before taking or rejecting
> the call.
> Currently, I have the image saved and send it using a push notification
> when the call occurs but I would like to skip that step and send it over
> SIP. In this way, you could send the image on the fly without having to
> store it on the server.
> For this, I need to know if there is the possibility of sending the image
> as data using the SIP protocol, in the SIP INVITE header or using an
> additional method so that the target endpoint (mobile) can see the image
> before to take the call.
> Any ideas on how to do it?
> José David Jurado Alonso
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