A Session Control transport service entity stores information about
     modules in the Transport layer that support Session Control.

1  –  status

   PROTOCOL

       Transport protocol used by this transport service, as specified by the
       user when this service was created. See the create command description
       for a list of possible values.

   TSEL

       Transport selector used by the OSI Transport Module to bind incoming
       connection requests to Session Control.  This attribute is not
       applicable for NSP transport.