Assertion: tcp connection | /r/CapableOf | use telnet
Facets:
Source sentences:
text: If you didn't establish an FTP connection using telnet, you should check your firewall software and add your FTP Client in the exclusion / white list of programs which can open ports.
text: If your FTP port is already listed there and you can't open an FTP connection using telnet, please contact your ISP and ask them to open port 21.