Gathers serial number from devices registered to Cisco Call Manager (CUCM)
- Open CUCM
- Go to Device > Phone
- Select "Device Type" from drop down
- In the drop down "Select item or enter search text" click "Cisco 8821"
- Click "Find"
- Change the Rows per Page to the max
- Copy output into a plain text editor like notepad and save it as inventory.txt
- Run app.py