000			00491 a2200169 4500
020			_a0071139338
040			_a0
082			_a621.382
100			_aKessler, Gary C.
245			_aISDN _bConcepts, Facilities and services _cKessler, Gary C.
250			_a2nd ed.
260			_aUSA _bThe McGraw-Hill _c1993
300			_axviii, 454 p. ; _bill. ; _c24 cm.
500			_aIncludes bibliographical references.
650			_a1. Integrated services digital networks.
942			_cBK _k621.382 KES _2ddc
999			_c11148 _d11148