home-assistant.io/source/_integrations/modem_callerid.markdown

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---
title: Phone Modem
description: Instructions on how to integrate the Caller ID sensor into Home Assistant.
ha_category:
- Sensor
ha_release: '0.40'
ha_iot_class: Local Polling
ha_domain: modem_callerid
ha_codeowners:
- '@tkdrob'
ha_platforms:
- button
- sensor
ha_config_flow: true
ha_integration_type: device
---
The `modem_callerid` integration uses an available modem for collecting caller ID information. It requires a Hayes AT compatible modem that supports caller ID detection (via AT+VCID=1). Usually any modem that uses a CX93001 will support this.
When the sensor detects a new call, its state changes to 'ring' for each ring and 'callerid' when caller id information is received. It returns to 'idle' once ringing stops. The state event includes an attribute payload that includes the time of the call, name, and number.
This integration also offers a button to pick up and then hang up the call to properly reject it (via ATA and ATH).
{% include integrations/config_flow.md %}
## Compatibility
Reported models with this integration include that work:
- [StarTech.com USB56KEMH2](https://www.startech.com/en-us/networking-io/usb56kemh2)
Devices that did not work:
- [StarTech.com USB56KEM3](https://www.startech.com/en-us/networking-io/usb56kem3)
## Examples
An example automation:
{% raw %}
```yaml
automation:
- alias: Notify CallerID
trigger:
platform: state
entity_id: sensor.phone_modem
to: "callerid"
action:
service: notify.notify
data:
message: "Call from {{ state_attr('sensor.phone_modem', 'cid_name') }} at {{ state_attr('sensor.phone_modem', 'cid_number') }} "
- alias: Notify CallerID webui
trigger:
platform: state
entity_id: sensor.phone_modem
to: "callerid"
action:
service: persistent_notification.create
data:
title: "Call from"
message: "{{ state_attr('sensor.phone_modem', 'cid_time').strftime("%I:%M %p") }} {{ state_attr('sensor.phone_modem', 'cid_name') }} {{ state_attr('sensor.phone_modem', 'cid_number') }} "
- alias: Say CallerID
trigger:
platform: state
entity_id: sensor.phone_modem
to: "callerid"
action:
service: tts.google_say
data:
message: "Call from {{ state_attr('sensor.phone_modem', 'cid_name') }}"
```
{% endraw %}