How disconnect from console session via modem

How can I disconnect from Terminal (PortServer TS 8 is installed on remote location) I’m getting access to PortServer via telnet-> modem dial-out.

I cannot send telnet escape character “^]”

You might want to use the connect command to connect to the modem port. For example to connect to port 1, from thePortServer TS prompt:

#> connect 1

atd…(modem commands)

[ .

This will use Control left-square bracket, period to disconnect from the port and return back to the PortServer TS prompt. Then you can exit and close your telnet session.