01103    a2200241   4500003000500000005001700005010001600022020001500038035002000053040000900073082001000082245008600092260011800178300004100296505025300337538002900590650002500619650005800644650004500702650004100747700002900788740004400817Nust20170207152523.0  a   88082227  a0818608293  a(OCoLC)19027192  cNust  a004.600aTutorial, digital private branch exchanges (PBXs) /c[edited by] Edwin R. Coover.  aWashington, D.C. :bIEEE Computer Society Press ;aLos Angeles, CA :b[Order from] IEEE Computer Society,cc1989.  aix, 384 p. :bill., ports. ;c28 cm.  aWhat PBXs Do and How They do It (Page-5), PBXs as Office Service Centers (Page-103), A Modern PBX in Detail NEC’s NEAX2400 IMS as Example (Page-153), PBXs as LANs (Page-213), Distrubuted Architectures (Page-265), Positioning for ISDN (Page-301),   aAlmirah No.3  Shelf No.4 0aDigital electronics. 0aPrivate branch exchange telephone equipment industry. 0aTelephone switching systems, Electronic. 0aTelephonexPrivate branch exchanges.1 aCoover, Edwin R.,d1942-0 aDigital private branch exchanges (PBXs)