UniCode supported
From Zenitel Wiki
UniCode as UTF-8 currently support for the DIP protocol:
"Roman" 0-0x7F Hebrew 0x5D0-0x5EA "MDF User defined": æ 0xE6 ø 0xF8 å 0xE5 Æ 0xC6 Ø 0xD8 Å 0xC5 Arrow up Arrow down ? 0x3F ä 0xE4 Dobble S.. 0xDF Ä 0xC4 Ö 0xD6 Ü 0xDC ö 0xF6