00490nam a22001697a 4500003000400000005001700004008004100021020001500062082001400077100004200091245006100133260003900194300001700233655002500250655002500275655002000300SNU20141216150316.0141216b        xxu||||| |||| 00| 0 eng d  a0072122765  a004.6 BAT  aBates, Regis J. aGregory, Donald W.   aVoice and Data Communications Handbookc/ Regis J. Bates  a- New Delhib; McGraw-Hillc@ 1996  axxiv; 998 p.  aVoice Communications  aData Communications   aPC/LAN networks