SNOM300 - Finding the IP Address via the handset
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1.  Silver Dial - press down, press up.
2.  You will see IPAdr in the right-hand corner
3.  Press the 'tick' button
4.  You will see IP Adr:
5.  Please make a note of the IP address - it will be in the format 
    10.x.x.x or 192.168.x.x 

On SNOM300, please do the following for conferencing:
1. Dial out to External number on L1
2. Put line 1 on hold (slow flashing) by pressing L2 and dial out to next External number
3. You should see Cnf.On on the display
4. Go back to line 1 and press the tick button, the flashing should stop and the Directory light will come on
4. You should see Cnf.Off in the display

You now have a 3-way call

To disconnect the conference:
1. Press the tick button again and both calls will go on Hold
2. you should see Calls on Hold:2 in display