000 00276nam a2200121Ia 4500
100 _aCollins, Daniel
020 _a0-07-136326-2
942 _cBK
245 _aCarrier grade voice over IP
260 _aMcGraw - Hill, Boston
_c2001
082 _a621.385 Col
300 _axvi,420
999 _c27517
_d27517