I have a Cisco C20 "TC220.127.116.115253" that exists outside of a firewall with a public IP at one of our sites. It has been receiving random calls from number@itsownip to number@itsownip. These calls are random throughout the day, and appear in the middle of a call and cause disruption.
Putting the unit behind a firewall is not an option at this site. I have already disabled SIP, and it is still occurring. What else can I do? How is it dialing what appears to be a SIP call without SIP enabled? Am I just missing something?
The last thing I did, which may or may not work, was give it an invalid multiway address to at least stop the calls from coming in during a meeting. This doesn’t prevent the original problem though.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...