HJD04系列交换机三方通话和会议电话的实现

Realization of Three Party Service & Conference Service in HJD04 Series SPX

ＨＪＤ０４系列交换机（ＨＪＤ０４大中容量数字程控交换机以及ＨＪＤ０４－ＲＭ端局机）是目前国内首选的优秀机种，系统中三方通话和会议电话功能的实现有其独到之处，本文对此作一简要介绍。

ln present,HJD04 series(HJD04 medium & large scale digital SPX and HJD04-RM terminalSPX)is the optimum version of the national SPX products.Their realization method for three party serviceand conference service is novel.This paper gives a brief description.