If user added a black list, IP542N will forbid the phone number incoming.
Adding a black list:
There are two ways to add black list, one is from menu, and the other is from your PC to use IP542N’s webpage.
From menu:
Step 1.Press Menu button, and then choose 4black list.
Step 2.Choose NewEntry, and then add one black list according to the prompt.
From Webpage:
Step 1.Log on the web, open Phone/Phonebook webpage, Black List column.
Step 2.Refer to the 7.6.4.1 Black List to add blacklist.
During an active call, pressing the MUTE button to mute the handset, headset or Handsfree. This prevents the person on the active call from
hearing what you or someone else in the room is saying; and the led behind the button change to red.
To cancel the Mute function, press the MUTE button again and the led return off.
5.6 Placing a Call on Hold
When IP542N is during one active call:
Step 1.Pressing the hold button to put the active call on hold, then you will hear a dial tone, the remote party will hear the hold music
Step 2.User can input the phone number to make call
Step 3.Pressing the hold button again to release the previously Hold state and resume the bi-directional media.