Bad filename in backup


when I bakup files from client, which consist czech diacritics, the file names are poorly displayed in cli and web interface.

Is there any settings to configure clients codepage?

there is my system description:
Server version 2.1.18, CentOS 7, codepage utf8, urbackup folder is in local disk btrfs formated
Client version 2.1.18, CentOS 5.11, codepage iso-8859-2

The Linux client assumes UTF-8 filename encoding, other encodings are not supported.