# 40141: TaskRouter->Conference

Log Level: ERROR

## Description

### Possible causes

* You did not provide a 'from' parameter on your 'conference' instruction.
* You provided an invalid format in your "from" field.

### Possible solutions

* Make certain 'from' contains a validated caller ID if you're dialing the PSTN.
* Make certain 'from' contains an acceptable caller field.

### Example

```bash
{
	"instruction": "conference",
	"room_name": "abc",
	"to": "client:alice",
	"from": "18001234567",
	"post_work_activity_sid": "WA0123456789abcdef0123456789abcdef"
}
```