LEADER 02494nam 2200601 450 001 9910780127603321 005 20230125224639.0 010 $a1-58053-622-0 035 $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(EXLCZ)99111086906325800 100 $a20200729d2003 uy 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 210 1$aBoston :$cArtech House,$dİ2003. 210 2$a[Piscataqay, New Jersey] :$cIEEE Xplore,$d[2003] 215 $a1 online resource (174 p.) 225 1 $aArtech House telecommunications library 300 $aDescription based upon print version of record. 311 $a1-58053-497-X 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.$01473303 701 $aLollo$b Mauro$01473304 801 0$bCaBNVSL 801 1$bCaBNVSL 801 2$bCaBNVSL 906 $aBOOK 912 $a9910780127603321 996 $aCentrex or PBX$93686414 997 $aUNINA