IPECS Release 5
Feature Description & Operation 5.0
2-135
2.68.4 Web User Manual
Description
The iPECS User Guide is available on-line as part of the iPECS Web services. The iPECS main
Web page permits access to the Web User guide. The guide is an html document, which can be
modified by replacing the HTML ROM image in the system with an external ROM image in
accordance with the appropriate LG-Nortel R&D STI.
Operation
Operation is detailed in the iPECS Admin and Maintenance Manual.
Conditions
1. Access to the User Guide is not password protected.
2. To support local languages, the HTML ROM image of a translated Web User guide may be
loaded into system memory.
Programming
Related Features
Web Administration
Hardware
2.69 SYSTEM NETWORKING
2.69.1 Centralized Control TNET
Description
In a Centralized Control TNET (Transparent Network), a central MFIM controls all remote modules
and terminals providing transparent networked access to all the features and functions of the central
iPECS as well as the resources connected to the iPECS.
Where the remote device is not directly reachable by the iPECS, RTP packets must be relayed
through a local VoIP channel. A remote device may not be reachable when WAN access for the
device is through a firewall or NAPT server. In this case, the remote devices are assigned a zone to
manage RTP traffic between other devices connected in the TNET. The zone defines when an
individual device requires use of the local VoIP channel. Zones are used to identify other group
characteristics as outlined in section Remote Device Zone Management.
Remote sites may include an MFIM operating in the local mode as a live back up to the remote
central system. Up to 15 local MFIMs can operate in local mode as part of a TNET. Under normal
circumstances, the central MFIM controls remote devices (gateway Modules and terminals) including
any local MFIM VoIP channels. However, should the WAN connection between the central system
and the remote devices fail, the local MFIM will assume the call server responsibility for the local
devices. The local MFIM thus provides local survivability and, based on configuration, may provide
PSTN back-up service (Fail-over) for internal calls that normally route over the WAN.
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