000			00614 a2200241 4500
020			_a9788131722893
082			_a004.6 _bVOI
090			_c32122 _d56762
100			_aDavidson, Jonathan
245			_aVoice over IP fundamentals
250			_a2nd.
260			_aNew Delhi _bPearson education _c2008 _g2008
300			_axxiv, 394p. _c24cm.
650			_aGateway central protocols
650			_aPSTN service
650			_aVoice security
650			_aSignaling system
700			_aMukherjee, Sudipto
700			_aPeters, James
700			_aBhatia, Manoj
700			_aKalidindi, Satish
942			_cL
999			_c58625 _d58625