LIND - "Line speed" vs. "Link speed" question

Hi everyone, I was just wondering if anyone can tell me the
relationship between "Line" speed and "link" speed in a LIND.   For
instance, if I have a SDLC line being used in a APPN network, and the
line speed is set at 19200, (which is set correctly) and there is an
attached non-switched controller, should the link speed be set at
19200 as well, or is there some other deciding factor there?  I would
guess that it should be the same, however I am not sure...  I have
checked the help on the CHGLIND cmd but it didnt give me much info.
In my situation the link speed is set to 9600 and I'm wondering if
this may be slowing the conversations down on the appn devices which
are attached to this ctl and lin. 

Thanks for any help,
Jamie Pratt
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