The ESI 24 key DFP telephone is designed for users that do not need all the features of the 48 key HDFP telephones. It comes with 12 programmable buttons and a dedicated voicemail key and is a speakerphone.. On a 24-Key Feature Phone: Repeatedly press ESI-DEX (while your station is idle) until you reach the desired Dex, then repeatedly press the dialpad key corresponding to the first letter of the desired name. When the name appears, press ESI-DEX again to auto-dial the number. On a 48-Key Feature Phone: Press ESI-DEX (while your station ESI Feature Phone User's Guide FOR WITH Integrated Answering Machine 0450-0483 ESI-DEX feature key (pg. F.1) PROG/HELP feature key for phone programming becomes a line key providing the appropriate lamp information and manual outside-line access. This item is an ESI 48 key H digital feature phone that has been thoroughly tested, refurbished and works with ESI GEN 1 and GEN 2, E-Class, S-Class, X-Class, or 50, 100, 200, 600, and 1000 communication servers. This Phone is in excellent cosmetic condition and allows you to program up to 30 programmable keys and has ESI-DEX a built in phone-book. how to change display name on esi 48 key phone - ESI Ivx 48 Key Dfp Feature Phones question. How to change display name on esi 48 key phone. Posted by Katie on May 03, 2013. Manuals & User Guides The phone's lower display will update to display the first eight making it a headset key; then plug the headset into the phone. To answer a call, press the headset key you programmed (to release the call, press the headset key that your ESI phone system allows in a conference. The ESI 48-Key Digital Feature Phone is specifically designed for users who are very active. The phone has a large display and plenty of programmable feature keys that will help you gain maximum produ esi 48 key h dfp buisness phone w/ curly cord and stand. Lowest Prices On ESI, Fast Delivery! - ESI 48-Key H DFP Phone Refurbished 5000-0452R -Call Certified Phone