000 00282nam a2200121Ia 4500
008 211209s1998 xx 000 0 und d
020 _a9780070484009
041 _aeng
100 _aALI,SYED R
245 _aDIGITAL SWITCHING SYSTEMS
260 _bTMH
_c1998
300 _aVII + 217
999 _c103542
_d103542