Firewalls usually work through a proxy server. In OnCall, go to File / Preferences / System and you'll see a box for entering a proxy server. Call your IT help desk and tell them you have an application that needs to communicate to a server using standard HTTP Post commands. Ask them for the name of your proxy server. It will look like a web address, something like proxy.myhospital.com. Also ask them what port it monitors. If the port is anything other than 80, you'll need to add that in the proxy box, with a space or a colon between the server name and the port number, as in:

proxy.myhospital.com 8080

If the initial message you get says that OnCall is trying to contact a server other than amion.com, (for example it lists something like "127.0.0.1"), go to File / Publish on the web. Hold the Ctrl and Alt keys down and click on the Online options button. You won't see anything happen but the key sequence re-initializes some of the communication settings in OnCall. After the Ctrl + Alt + click, try the Quick Send again.

OnCall should be able to communicate through most firewalls but it does not support authentication. If your firewall requires proxy authentication, you might get a message from OnCall saying Unexpected, oversize reply. Ask your IT department if they can set up an exception in the firewall to allow traffic to and from amion.com without authentication.

If you cannot get the Quick Send to work, you can publish through a web browser. Go to File / Publish and click the Admin Login button. OnCall opens a browser window and takes you to the Amion Administrator page. A text cursor will be flashing in a box near the top. Hit Ctrl + V or Edit / Paste. The name of your schedule file should appear in the box. Hit Enter or click Send to publish.