V10:Advanced → SIP/RTP(Tab) → SIP(Section) → SIP Header Warning
N/A
V10
<sip_header_warning perm="PERMISSIONFLAG">VALIDVALUE</sip_header_warning>
If this setting is "on", the warning header is displayed when the received warning code is matched with the list of accepted codes, which is specified on sip_header_warning_codes. Otherwise, it is not displayed.
<on>, <off>
off
deskphone: If the setting is a Snom deskphone setting