all this stuff can be found at ww.gnu.org ;)
from [2]: using the ordinary GPL for a library makes it available only for free programs (see [1] for definition 'free programm').
I think you are quoting that out of the context now; what the quotation means is that it is _possible_ to link for example Kannel with GPL'd software - but then the whole bundle must be GPL'd. Your quotation just tells, that Kannel licence, being a free one, is GPL-compatible and does not prevent it being made GPL.
But there is no question about linking: linking GPL'd program with another program means that you have to release the combined program under GPL.
