IPECS Release 5
Feature Description & Operation 5.0
2-136
Under certain operating conditions, this equipment cannot be relied upon to make emergency calls.
Alternative arrangements should be made for access to the emergency services.
Operation
System
Operation of Centralized Network is automatic when configured & defined
Conditions
1. In a Centralized Network, the maximum number of channels available is the maximum number
of channels supported by the central MFIM.
2. In TNET, Centralized Miscellaneous functions (Relay support, MOH, BGM, Alarms and
External Page) are not supported but, all terminals in the TNET can make and receive pages.
3. When NAPT or other firewall functions are implemented, packet relay for RTP packets is
required. Packet relay requires VoIP channels for each simultaneous call desired.
4. The local MFIM will take over operation of registered devices if the central controlling MFIM
does not respond to three consecutive poll attempts over a 10-second period. The central
MFIM will gain control automatically upon return of the WAN connection.
5. iPECS can be installed behind a NAPT however, Fixed Nat – port forwarding is required for the
host to be reachable by remote devices.
Programming
TNET 1. TNET Basic Attributes (PGM 330)
2. TNET Central MFIM Attributes (PGM 331)
3. TNET Local MFIM (PGM 332)
4. Fail-over PSTN Attributes
Related Features
Remote Device Zone Management
Hardware
Remote MFIM to support Local Survivability
2.69.2 Distributed Control Network
Description
In the Distributed Control Network, each iPECS system maintains control over the devices registered
to it. The networked systems communicate allowing other networked systems access to resources
over the network. In addition, other features and functions as detailed in the following sections of this
manual are available to users in a distributed network environment. The iPECS permits remote
access to various resources through registered gateway Modules and terminals.
In addition, iPECS will request access to resources of remote systems. The user-dialed number is
analyzed and the call routed according to the Net numbering table. Should the main path fail to
respond, the iPECS routes the call employing the alternative Speed Dial route assigned.
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