00780cam a22002654a 450000100090000000300080000900500170001700800410003401000170007502000280009204000260012004200080014605000260015408200170018010000220019724500730021926000360029230000340032836500150036244000440037750000200042165000240044165000310046570000180049613043405BD-DhUL20150114174302.0021230s2003    maua          001 0 eng    a  2002044068  a158053497X (alk. paper)  aBD-DhULcBD-DhULdDLC  apcc00aTK5105.8865bA27 200300a621.385bABC1 aAbrahams, John R.10aCentrex or PBX :bthe impact of IP /cJohn R. Abrahams, Mauro Lollo.  aBoston :bArtech House,cc2003.  axvi, 161 p. :bill. ;c24 cm.  aUS$b89.10 0aArtech House telecommunications library  aIncludes index. 0aInternet telephony. 0aCentrex telephone service.1 aLollo, Mauro.