Hi.

We've just launched the JustCall integration with Slack. JustCall is a cloud phone system to get phone numbers instantly and make, receive, log & record phone calls from web, mobile or desktop. Now, it sends all calling activities, missed call notifications and voicemail recordings into a Slack channel so that your sales and support reps can track calls without leaving Slack.

https://justcall.io/blog/slack-integration-phone-call-tracking.html