ISDN
KESSLER, GARY C
ISDN Concepts Facilities and Services - 2 Ed. - Delhi McGraw-Hill 1993
ISDN
INTEGRATED SERVICES DIGITAL NETWORKS
D65,4 / KES
ISDN Concepts Facilities and Services - 2 Ed. - Delhi McGraw-Hill 1993
ISDN
INTEGRATED SERVICES DIGITAL NETWORKS
D65,4 / KES