LEADER 02529nam 2200637Ia 450 001 9910956363603321 005 20200520144314.0 010 $a9781580536226 010 $a1580536220 035 $a(CKB)111086906325800 035 $a(EBL)227645 035 $a(OCoLC)53275407 035 $a(SSID)ssj0000119353 035 $a(PQKBManifestationID)11132323 035 $a(PQKBTitleCode)TC0000119353 035 $a(PQKBWorkID)10058046 035 $a(PQKB)10279125 035 $a(Au-PeEL)EBL227645 035 $a(CaPaEBR)ebr10081917 035 $a(CaBNVSL)mat09100600 035 $a(IEEE)9100600 035 $a(MiAaPQ)EBC227645 035 $a(Perlego)4663813 035 $a(EXLCZ)99111086906325800 100 $a20021230d2003 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aCentrex or PBX $ethe impact of IP /$fJohn R. Abrahams, Mauro Lollo 205 $a1st ed. 210 $aBoston $cArtech House$dc2003 215 $a1 online resource (174 p.) 225 1 $aArtech House telecommunications library 300 $aDescription based upon print version of record. 311 08$a9781580534970 311 08$a158053497X 320 $aIncludes bibliographical references and index. 327 $aVirtual PBX Service -- Integration with On-Premise Switches -- Multiple Centrex Systems -- Investment in Centrex Software -- Development of Internet Protocol Centrex -- Blurring the Boundaries -- Internet Protocol Centrex -- Interactive Communications over Internet Protocol -- Layer 3 and 4 Protocols -- IP Telephony -- 330 8 $aAnnotation The current trend for business telecommunications is to Internet protocol telephony, which integrates voice, video and data traffic. This new book offers guidance to those who have the responsibility to manage, design, and upgrade data networks to carry IP telephony. The book describes the IP-Centrex option of having the telephone company take responsibility for the service delivery. 410 0$aArtech House telecommunications library. 606 $aInternet telephony 606 $aCentrex telephone service 615 0$aInternet telephony. 615 0$aCentrex telephone service. 676 $a621.382/12 700 $aAbrahams$b John R$01809255 701 $aLollo$b Mauro$01809256 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910956363603321 996 $aCentrex or PBX$94359956 997 $aUNINA