Group Polls 	  The number of unnumbered group polls received on
                   this link.

   Frame Receive   The number of times the physical layer encountered
   Errors          an error trying to receive a frame.

   Underlying      The number of times the Link's underlying Line was
   Lines           deleted after the Link had established a connection
   Deleted         to it.

   Creation Time   The time that the SDLC Link subentity was created.