SDDN
Software Defined Data Network - Public Service Netz mit wahlweise 56, 64, 384 oder 1536kBit/s ab Anfang 1991 (AT&T)
SDDN
Software Defined Data Network (AT&T)
SDDN
Software-Defined Data Network. An AT&T offering that allows users to customize and manage a virtual private network for traffic within AT&T's switched digital network.