User manual

CHAPTER 2 SYSTEM CONFIGURATION
Page 40 NEAX 2000 IPS General Description
NDA-24345, Issue 3
Remote PIM over IP System Outline
When IPSDMR and 2000 IPS PIM are installed at Remote Site, and connected to a Main Site over IP
network, the Main Site system controls and maintains the operation of Remote Sites as one single
system. If a communication failure occurs between the Main Site and Remote Site, the Remote Site
automatically changes over to a survival mode and operates as a stand-alone system.
IPSDMR: IPS Distributed Model Remote (with PN-CP31-A/PN-CP31-B)
IPS PIM: IPS (with PN-CP24-A/PN-CP24-B)
Outline of System Operation
• The MP card of Main Site controls call processing, and Remote Site follows the Main Site 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 Remote Site is
directly connected to the PSTN/GSTN.
• In the case of connections between Main Site and Remote Site, or Remote Site and Remote
Site, the voice path is connected via Peer-to-Peer or IP-PAD.
• If the communications between Main Site and Remote Site are interrupted, the Remote 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 the own system
and starts survival mode operation as a stand-alone system to control the call processing
within the Remote Site.
• During survival mode operation, Remote Site system checks regularly whether the
communications with Main Site is possible or not. When the Remote Site regards that the
communications are possible, the Remote Site will change over to the normal mode 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 the designated
Dterm or DtermIP at both sites, and allows users at both sites to notice the link failure.