000			00494nam a2200169Ia 4500
008			161214s9999 xx 000 0 und d
020			_a9780070342491 _c(hbk)
082			_223 _a621.382 _bKES
100			_aKessler, Gary C.
245		0	_aISDN : concepts, facilities, and services
250			_a3rd ed.
260			_aNew York: _bMcGraw-Hill, _c1997
300			_axxiv, 672 p.; _bill.: _c24 cm.
650			_aIntegrated services digital networks
700			_aSouthwick, Peter V.
942			_2ddc _cBK
999			_c10379 _d10379