Cisco Cisco Email Security Appliance C190 用户指南
B-511
Cisco IronPort AsyncOS 7.1 for Email Advanced Configuration Guide
OL-22164-02
Appendix B Accessing the Appliance
8
CTS
O
Clear to send
9
RI
I
Ring indicator
Shell
n/a
n/a
Chassis ground
Pin
Signal I/O
Definition