We have a couple of EX-90s operating on TC 5.1.7 and TC 4.0.4 which I am trying to upgrade to TC 7.3.12 but it doesn't appear to be working.  I have performed the upload, the process appears to go through the motions but after reboot it still comes b...

I am having a problem with a Cisco 7970G VoIP phone...when I power it up the mic button flashes red, then the green speaker button comes on for about 10-15 seconds. After that the speed dial buttons start cycling, at first the top two buttons flash ...

I am extending an existing network to another space and want to use a Cisco 3560-8PC switch, this will give me plenty of future expansion. However, I will need PoE and I would like for the switch to be layer 2 capable, but I cannot find anything in ...

I am trying to troubleshoot my VoIP phone not powering up when I connect it to my fa 0/1/0 on a 3825 with an HWIC-D-9ESW with the PoE option installed. The phone used to work but just stopped. When I plug it into any port on the HWIC the power LED ...