sco unix telnet问题

sg

我单位有一台服务器装了sco unxi 5.0.6,用netterm登录特慢，/var/adm/syslog,有以下内容：请高手帮忙。
Jan 20 08:56:19 ycipp telnetd[22257]: unable to write terminal control database entry for line ttyp4
Jan 20 08:56:19 ycipp telnetd[22232]: can't find terminal control database entry for line ttyp0
Jan 20 09:30:22 ycipp telnetd[22743]: can't find terminal control database entry for line ttyp6
Jan 20 09:30:56 ycipp telnetd[22669]: can't find terminal control database entry for line ttyp5
Jan 20 09:33:36 ycipp telnetd[22949]: can't find terminal control database entry for line ttyp5
Jan 20 09:34:33 ycipp telnetd[22965]: can't find terminal control database entry for line ttyp5
Jan 20 09:46:48 ycipp telnetd[23420]: can't find terminal control database entry for line ttyp5
Jan 20 10:28:53 ycipp telnetd[24169]: can't find terminal control database entry for line ttyp8
Jan 20 10:29:27 ycipp telnetd[24175]: can't find terminal control database entry for line ttyp9
Jan 20 10:32:02 ycipp telnetd[24201]: can't find terminal control database entry for line ttyp8
Jan 20 10:36:12 ycipp telnetd[24047]: can't find terminal control database entry for line ttyp5
Jan 20 10:39:44 ycipp telnetd[24270]: can't find terminal control database entry for line ttyp5
Jan 20 10:40:23 ycipp telnetd[22783]: can't find terminal control database entry for line ttyp7
Jan 20 10:41:33 ycipp telnetd[24300]: can't find terminal control database entry for line ttyp8
Jan 20 10:47:13 ycipp telnetd[24383]: can't find terminal control database entry for line ttyp8