This would most probably be caused by one of the two things: Your network is off - try opening any well-known website, like Google. If not working, please reset your networking equipment and contact your network provider for support; Your on-premises dialer is off - Please check if your dialer server is turned on and physically connected to the network. Reboot if necessary. In rare cases, the web server service of the dialer will be off or your IP address might be blocked by us due to sending erroneous traffic. Please contact us for support if this is the case.