Library /sys$common/syshlp/tcpip$ucp_help.hlb DELETE, COMMUNICATION_CONTROLLER, Qualifiers, /INTERNET_INTERFACE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /INTERNET_INTERFACE=character

    Optional. Default: All letters.

    Deletes the specified letter (which represents the first letter
    of an interface name).