Used to connect to another system host
The cu command is used to connect to another system host. cu (call up) can connect to another host and work using an interface similar to a dial-up terminal, and can also perform simple file transfer tasks.
cu [dehnotv][-a<communication port>][-c<phone number>][-E<escape character>][-I<configuration file>][-l<peripheral device ID>]
[-s<connection speed>][-x<debug mode>][-z<system host>][--help][-nostop][--parity=none][<system host>/<phone number>]
-a <communication port> or -p <communication port> or --port <communication port> Use the specified communication port for connection.
-c <phone number> or --phone <phone number> Dial the phone number.
-d Enter debug mode.
-e or --parity=even Use even parity check.
-E <escape character> or --escape <escape character> Set the escape character.
-h or --halfduple Use half-duplex mode.
-I <configuration file> or --config <configuration file> Specify the configuration file to use.
-l <peripheral device ID> or --line <peripheral device ID> Specify a peripheral device as the connection device.
-n or --prompt Wait for the user to enter the phone number when dialing.
-o or --parity=odd Use odd parity check.
-s <connection speed> or --speed <connection speed> or --baud <connection speed> or -<connection speed> Set the connection speed in baud rate.
-t or --maper Replace CR character with LF+CR character.
-v or --version Display version information.
-x <debug mode> or --debug <debug mode> Use debug mode.
-z <system host> or --system <system host> Connect to the system host.
--help Online help.
--nostop Turn off Xon/Xoff software flow control.
--parity=none Do not use parity check.
Connect to a remote host:
cu -c 0102377765
cu -s 38400 9=12015551234