NEC MH110 - SETUP AND Administration Manual page 24

3-4 MH110/MH120 Mobile Handsets
NOTE
Audio Features
Speakerphone features such as paging, hands-free mode and voice
announce are not available on the Mobile Handset. The telephony switch
should not be programmed to support such features on the Mobile
Handset.
Line Indicators
The line indicators on the Mobile Handset will convert to a solid or
flashing number to mimic the icons next to Line keys on the NEC
DtermIP-16LD. The text that appears next to the line keys on the IP
Phone is accessed on the Mobile Handset by pressing the LINE key.
Line keys must be programmed on Lines 1-4 while features are programmed on
keys 5-16.
MH110/MH120 IP Wireless Telephone Setup and Administration Guide - Revision 1