Another quick tip for those manging CUCM aka: CallManager env


When messing with DN numbers, sometimes you just get the ext # next to the button on your Cisco phone. However, unless you do BAT ( see you might have to manually change these extensions one by one. Un order to change this, go to the DN number and scroll down towards the Line section. Fill in the name you want to appear under the first 3 fields (Display, ASCII Display, Line Text Label). This doesn’t requre any reset/restarts and will auto update the users screen.

Also, some users request when a DN rings, to not make any sound, but flash on their handset. To do this for this particular DN, same section, but go under the Ring Setting (Phone Idle) and/or Ring Setting (Phone Alert) and change this to Flash Only.

William Zambrano

William Zambrano

NYC networkers is run by William Zambrano, a passionate network engineer who has been in the IT industry for eight years who posts up blog articles, YouTube videos, and holds events in the NYC area. He lives in Queens, New York and has consulted in various different companies in the NY area. Previously William worked as a Cisco Certified Systems Instructor (CCSI) but now currently works for Arista Networks serving as a Systems Engineer. William can be reached by email at

More Posts - Website

Follow Me: