Mute feature on Electra Elite IPK 192

[NiceRing]

Simple question but I cannot find this in the user guide. I need to find out how to mute a call on the NEC DTH or DTU phones. I looked in the user guides and can't find anything in there. I thought it might be a soft key function, but it is not.

 

[belevedere]

OPERATING PROCEDURES While talking on a DTP or DTU Terminal Handset:
Press FEATURE and dial 1.
While talking on an Electra Professional Multiline Terminal Handset:
Press the UP and DOWN keys at the same time.
SERVICE CONDITIONS
General:
This feature is not supported by revision 1 for Electra Professional Multiline Terminals.

Related Feature Name
F-2 Feature Access – User Programmable
You can program it under a featre access key. See features and specs or user guide.

 

[NiceRing]

I tried that F2 but nothing happened. I think one model of phone has a FEATURE key and the older ones have a FUNCTION key. I see, I have to program a Feature Access Key to do it. Got it, thanks.