I need an operating manual for Lucent 854 - Lucent (854250) Modem

Thats because its looking for the intercom number to be assigned. as soon as you assign one in programming it will stop.

Press PROGRAM
Press *
Press #
Enter 2 digits (11 through 22)
Press INTERCOM

This should work.

To Adjust Ringer Volume:
1) Press CONF, then using the dialpad press either 1, 2, 3 or 4 to indicate which line you want to adjust.
2) Press one of the VOLUME buttons to increase or decrease the ringer volume.

To Turn the Ringer Off
1) Press CONF
2) Use the dialpad, press 1, 2, 3, or 4 to indicate which line you want to adjust
3) Press the down VOLUME until you no longer hear a tone.

Try the "DND" button. It's the furthest to the right in the top row of buttons.

press program button
press * then press #
Press 2 (or 3 or 4)
press 0 to turn off light or press 1 to turn on light
press transfer


done
the 2, or 3, or 4 are the L2 L3 or L4 lines

Yes !!!

You can get a splitter for it which will then divide that one phone jack into 3 out or 4 out which ever you need. the only problem that you might run into is how close the phones might be to each other. Otherwise there isn't much other ways around it with only one phone jack.

While your phone is ringing (during an incoming call) hit the volume down button until the level of ringing is where you want it.

http://www.ez-manuals.com/products.asp?cat=27 This is for a manual for the system. the phone will not operate with out the main system.