TOTO,
we're not in Kansas anymore...

A server error occured and unexplained things are happening around us.

Emer.Zz

tecnologÍa sdh(synchronous digital hierarchy)jerarquía digital sincrónicaby: zumbana emersonuniversidad de las fuerzas armadas espe - lcomunicaciones

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TECNOLOGÍA SDH | Presentation by Emer.Zz