NEC UNIVERGE NEAX 2000 IPS General Description Manual

Also see for UNIVERGE NEAX 2000 IPS: Installation guide User guide User guide User guide Reference guide

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NEC UNIVERGE NEAX 2000 IPS General Description Manual Manual pdf 47 page image

CHAPTER 2 SYSTEM CONFIGURATIONUNIVERGE NEAX 2000 IPS General Description Page 43Issue 5Remote PIM over IP System OutlineWhen IPS DMR and 2000 IPS PIM are installed at Remote Site, and connected to a Main Site overIP network, the Main Site system controls and maintains the operation of Remote Sites as onesingle system. If a communication failure occurs between the Main Site and Remote Site, theRemote Site automatically changes over to a survival mode and operates as a stand-alone system.IPS DMR: IPS Distributed Model Remote (with PN-CP31-D)IPS PIM: IPS (with PN-CP24-D)Outline of System Operation• The MP card of Main Site controls call processing, and Remote Site follows the MainSite in normal operation mode.• Remote Site can accommodate analog Single Line telephones, Dterm, PS, DtermIP,and LT/AP cards.• Local Switch (TDSW) at Remote Site connects an outside party when the RemoteSite is directly connected to the PSTN/GSTN.• In the case of connections between Main Site and Remote Site, or Remote Site andRemote Site, the voice path is connected via Peer-to-Peer or IP-PAD.• If the communications between Main Site and Remote Site are interrupted, theRemote Site starts a survival mode operation after the system reset.Outline of Survival Mode Operation• Remote Site system watches a Keep Alive signal sent from Main Site regularly.• If a line failure occurs (Keep Alive signal is not received), Remote Site resets theown system and starts survival mode operation as a stand-alone system to control thecall processing within the Remote Site.• During survival mode operation, Remote Site system checks regularly whether thecommunications with Main Site is possible or not. When the Remote Site regards thatthe communications are possible, the Remote Site will change over to the normalmode to communicate with the Main Site automatically or manually.Outline of Survival Mode Operation• This feature displays the link state between Main Site and Remote Site on thedesignated Dterm or DtermIP at both sites, and allows users at both sites to notice thelink failure.