# Pause or resume a pool number (/docs/api-reference/bulk-calls/setBulkCallNumberActive)

> Stop or resume dialing from one number in the pool.

**PUT** `/calls/bulk_call/{bulk_call_id}/numbers/{assignment_id}`

Stop or resume dialing from one number in the pool.

Pausing is what you want when a number starts going bad mid-campaign:
dialing moves to the next number in sequence and the paused number keeps
its history and counters. The last active number of a running campaign
cannot be paused, since the campaign would have nothing to dial from.

Send the state you want rather than a toggle, so retrying the same
request is harmless.

`assignment_id` is the number's id **within this campaign's pool**, from
List rotation pool. It is not the `phone_number_id`.

```yaml
operationId: setBulkCallNumberActive
parameters:
  - in: path
    name: bulk_call_id
    required: true
    schema:
      type: integer
    description: Id of the bulk call campaign.
  - in: path
    name: assignment_id
    required: true
    schema:
      type: integer
    description: The `assignment_id` from List rotation pool.
requestBody:
  required: true
  content:
    application/json:
      schema:
        type: object
        required:
          - is_active
        properties:
          is_active:
            type: boolean
            example: false
            description: '`false` pauses the number, `true` resumes it.'
responses:
  '200':
    description: New state of the number.
    content:
      application/json:
        schema:
          type: object
          properties:
            status:
              type: string
            is_active:
              type: boolean
        example:
          status: success
          is_active: false
```

**cURL**

```bash
curl -X PUT "https://backend.omnidim.io/api/v1/calls/bulk_call/314/numbers/508" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"is_active": false}'
```

**curl**

```bash
curl -X PUT "https://omnidim.io/api/v1/calls/bulk_call/{bulk_call_id}/numbers/{assignment_id}" \
  -H "Authorization: Bearer $OMNIDIM_API_KEY"
```