780025 handset mic does not work

Lift your handset and dial *81, it will call the extension that messaged you, they will have to lift their handset to complete this function

1. Press the ^ or v button toincrease volume while on a call2. Selecting ring pitch and ring volume• Pickup handset• Pressprogram button• Dial#• Dial0-9 RINGING VOLUME SOFT MEDIUM LOUD RINGING TONE PITCH SLOW 1 2 3 MEDIUM 4 5 6 FAST 7 8 9 OFF b> 0 b> b> b> b>

The User Guide will give you all the information

chang mic inside hand

is the nec dsx telephone voicemail light red or green...?
if it's green, it's not the voicemail light, rather, it's the caller id missed call indicator. just look through your missed calls and it will go out... or if you have the admin software, go to class of service, station, and disable the caller-id alert lamp.
free download of admin software at our website http://www.nec-dsx.com

There is an inexpensive built in mic where you speak into the handset. Ifit is not clogged with any debris, the mic needs to be removed with a soldering iron and replaced with a like one from Radio Shack.

Check to make sure the Mic light is lit. Feature +1 controls the Mic.

i believe the nec dtp-2dt maybe a phone system phone for offices. you didn't mention if it's for home or office use.a phone system phone will not work in a regular phone jack. it needs to go thru a phone system. also if you buy any 2 line phones, you need 2 lines for both lines to work. you can also have a 2 line phone with only 1 line and order a 2nd line if needed
hope this helps
wg

Sir, a co-worker with this phone has the same problem, i have a fund the users manual for the phone and the code to turn on/off the mic is Feature then the number 1. for her the mic button lights up when the phone is off. meaning no one can hear her. the link for the users guide is.


http://www.chickasawtel.com/pdf/manuals/elitemultilineug.pdf


hope this helps.

Press Feature 1 That will turn the mic off, or on.