Using an analog line for 911 / Emergency calls at remote sites

Using an analog line for 911 / Emergency calls at remote sites

If your company sends all calls out a central location (i.e. the HQ), then you may have problems when someone at a remote / satellite office makes an emergency call. You don’t want emergency responders go to the wrong address because of a mis-configured phone system. You and easily fix this by installing a cheap analog line at each remote site, and routing emergency calls out of that.

Host not found error when accessing the corporate directory

Host not found error when accessing the corporate directory

After upgrading our CUCM cluster to 8.5 (from 7.1) we noticed that some model phones lost access to the corporate directory.  When pressing the button they would get the error “Host not found” on the screen.  After some trial and error we found that this was related to the firmware used on each phone.  For example, a 7970 would work fine with firware but when upgraded to SCCP70.9-3-1SR2-1S the host not found error would creep up.

It turns out that Cisco has introduced a new set of  secure URLs for phones to access CallManager over https.