How can I use Telnet multiple port support to enable a combination of secure and non-secure traffic?

The IP Configuration Guide points out:

"You can use Telnet multiple port support to enable a combination of secure and non-secure traffic.

"To use multiple port support, you define separate ports; one port is dedicated to non-secure traffic and another port is dedicated to secure traffic. Ports with the designation SECUREPORT or TTLSPORT can be secure.

"Intranet clients are not required to be secure. Intranet clients connect to the BASIC port.

"All clients connecting from the Internet are required to be secure; these clients use the SECUREPORT."

The PORT parameter statement in the TELNETPARMS block defines the port that Telnet listens on for non-secure (basic) connection requests.

The SECUREPORT parameter statement in the TELNETPARMS block defines the port that Telnet listens on for secure connection requests from a client using the SSL protocol.

The following Telnet profile statements define two ports with the following characteristics:

• Port 23 allows only basic connections.

• Port 992 allows only secure connections. No client authentication is requested.

 TELNETPARMS            ; basic port does not support secure connections
   Port 23
  ENDTELNETPARMS
  TELNETPARMS                        ; port that allows only secure connections
   SECUREPORT 992                    ; no client authentication requested
   KEYRING hfs /usr/keyring/tcp1.kdb ; keyring used by all SECUREPORTs
  ENDTELNETPARMS                     ; any supported encryption algorithm

 BEGINVTAM
       Port 992 23
       ...                       ;Mapping statements
                                 ;no PARMSGROUP defined for these ports
                                 ;TELNETPARMS definitions used for all connections
 ENDVTAM