Hello all, I've noticed that when connecting to sip server with telnet on koha 3.16.1 and testing some commands like this 2300120080623 172148AOCL|AA123456|ACsipstation01|ADbadpassword We get an answer with an arabic names, it seems to be good for about 30 mins and sometimes about 2 hours like this 24YYYY YY 00120150109 203104AEمحمد احمد|AA123456|AFGreetings from Koha. And after this period the arabic names become (?) like the following: 24YYYY YY 00120150109 203104AE???? ????|AA123456|AFGreetings from Koha. But when i tried koha 3.14 i got the Arabic names very good all the time,So i tried to transfer the sip folder of koha 3.14 to koha 3.16.1 but the problem still found, So the problem wasn't from SIP files. Then i tried to transfer C4 folder of koha 3.14 to koha 3.16.1, and run sip server fon koha 3.16.1, I got the Arabic names very good all the time like koha 3.14, But off-course it makes some errors in koha pages cause of incompatibility, So i think there some changes in C4 folder (.pm) files affect sip server in koha 3.16.1 which violates sip server on koha 3.16.1 after a short time and convert Arabic characters to (?). Any suggestions??? Thanks.