Hi,I've bought a CISCO 1921 K9/SEC a few days ago. But I'm unable to setup my first CISCO device on my own:Network-overview:ISP                                                  CISCO 1921                                                    LAN192.168....

Hi,I've got a problem with my brand new UC520. It's a great system, evreything works fine, except of one big issue!A few customers of one specific region couldn't give us a call.-They'll get the busy line sound, if they dial our telefone number witho...