# Implementation of callback in Bitrix24

**2** implementation options**:**

1\) The call comes to one person (parameters as in originate).\
We need to add the following to our config (example for calling 123):

`"callback": {`\
`"caller_id": "Callback to #TO#",`\
`"channel": "SIP/123",`\
`"context": "from-internal",`\
`"extension": "#TO#",`\
`"priority": "1"`\
`}`

2\) Or the call comes to the group via a local channel.\
The downside is that such calls are often not recorded, as they go through local channels.\
If there are events in CEL on SIP/# channels when calling internal numbers, then the call will be registered.\
In `/etc/asterisk/extensions_custom.conf` add:

`[from-callback-n]`\
`exten => s,1,Goto(from-internal,#number#,1)`\
\`\`\
`[from-callback]`\
`exten => _8ZXXXXXXXXX,1,Dial(SIP/#trunk#/${EXTEN},30,)`

In the module configuration file `/etc/itgrix_bx/config.json` add:\
`"callback": {`\
`"caller_id": "Callback to #TO#",`\
`"channel": "Local/s@from-callback-n",`\
`"context": "from-callback",`\
`"extension": "#TO#",`\
`"priority": "1"`\
`}`

\
On the portal, create a form similar to\
<https://zadarma.com/en/support/instructions/bitrix-widget/>\
The application will appear in the selection when the module is installed or launched.