The SIP Diversion Header can be inserted in the SIP INVITE when you receive an redirected incoming call from another user. 

Example: A calls B and is redirected to C. User C will see on the display the information that A tried to call B.

From software 2.16.6, we added the option to disable/enable the device to show this Diversion information.

Maxwell display information

Below an example for an incoming redirected call.

Normal behavior: Show Display Diversion information is set to Yes

Show Display Diversion information is set to No

In the web-interface go to: Telephony - VoIP - Display Diversion Info