[Koha] Testing Koha 3.16.01 SIP

Hello All, When testing koha 3.16.01 SIP using telnet by trying to run this command 2300120080623 172148AOCL|AA123456|ACsipstation01|ADbadpassword we get the following result 24YYYY YY 00120141224 055624AE???? ????|AA123456|AFGreetings from Koha. where (???? ????) is an Arabic name of the user, We are asking why the Arabic names appear as question marks. Thanks.