Multiple connections to single SMSC

I am not too familiar with the underlying protocols,
but is it possible to make multiple connections to a
single SMSC (mainly with the SMPP protocol).

The two scenarios that I'm concerned with are:
(A) Multiple boxes each running a single SMS gateway
and each gateway wants to connect to the same SMSC.
(B) Single box running a gateway that wants to make
multiple connections to the same SMSC (perhaps using
different username/passwords).

Are these scenarios possible?
Thanks.
Michael

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