I'm an end user and not a phone system expert, so I'll apologize up front! We have a UC540 with SPA525G phones and want to configure it for VOIP calls. The UC540 is on our local network behind our company firewall. Our firewall will need to be config...

We're a small business located in California and we self installed a UC540 system a couple of months ago. We followed the wizards to setup the system, so we are by no means experts. During this time we have had multiple reports of the auto attendant ...