MSR3600使用异步串口模块登陆其他设备时出现乱码

MSR3600，版本Version 7.1.064, Release 6749P43，安装有RT-SIC-16AS异步串口模块板卡。

配置为

#

interface Async1/1

 description TO:JLLT-CCESN-603-DXHJ-SW191-62.CONSOLE_TCP20070

 async-mode flow

 undo detect dsr-dtr

#

interface Async1/2

 description TO:JLLT-CCESN-603-AQJG-SW191-49.CONSOLE_TCP20071

 async-mode flow

 undo detect dsr-dtr

#

line tty 18

 undo shell

 flow-control none

 user-role network-operator

 redirect enable

 redirect listen-port 20070

 redirect timeout 30

#

line tty 19

 undo shell    

 flow-control none

 user-role network-operator

 redirect enable

 redirect listen-port 20071

 redirect timeout 30

通过异步串口模块登陆其他设备时，部分设备出现下边的乱码，是什么原因导致的。

<JLLT-CCESN-603-IPMI-SW77-61>U

                             ^

 % Unrecognized command found at '^' position.

<JLLT-CCESN-603-IPMI-SW77-61>U

                             ^

 % Unrecognized command found at '^' position.

<JLLT-CCESN-603-IPMI-SW77-61>U

                             ^

 % Unrecognized command found at '^' position.

<JLLT-CCESN-603-IPMI-SW77-61>U

                             ^

 % Unrecognized command found at '^' position.

<JLLT-CCESN-603-IPMI-SW77-61>U

                             ^

 % Unrecognized command found at '^' position.

<JLLT-CCESN-603-IPMI-SW77-61>U

                             ^