Motorola V186 - Cell Phone - GSM System Planner Manual page 109

When one RTU transmits to another, the transmission will go through the FEP which will
route it to its destination, without the need of a network configuration.
Note: This feature can also be used in an FEP connected to the CEN of ASTRO IV&D,
where it is required for one RTU connected to a radio to communicate with another RTU.
MDLC over IP PPP Connections
The ACE3600 RTU can include up to four RS232/PPP ports - two on-board (SI1 and
SI2) and two plug-in RS232 ports (PI1 and PI2.) Each port may be PPP connected to a
packet data radio/modem over PPP and have its own link ID.
Several RS232 over PPP connections are supported:
• MDLC via IDEN modem (e.g. iM1000, iM1500)
• MDLC via Astro IV&D digital radio (e.g. XTL5000)
• MDLC via Standard modem, (e.g. GPRS data modem.) See MDLC over Standard
Modem Setup for configuration details. A modem configuration file must be
attached to the site and downloaded to the RTU when using this connection.
• MDLC via Tetra radio. This is similar to Standard modem. See MDLC over Tetra
Setup for configuration details. When using a Motorola radio (e.g. MTM800), no
modem configuration file needs to be downloaded.
• MDLC via Null modem. This is suitable for direct cable connections over PPP
with devices such as Terminal Servers, wireless modem, etc. Depending on the
modem used you may or may not need to download a modem configuration file.
• MDLC over ASTRO IV&D. See MDLC over ASTRO IV&D for configuration
details. When using the ASTRO IV&D (Integrated Voice & Data) connection, no
modem configuration file needs to be downloaded.
In order for a variety of modems to be used, a modem configuration file is downloaded to
a specific port configured for MDLC over IP. The modem/radio can also be diagnosed
using AT commands specified in that file. For MDLC over IP this feature is applicable to
all connections: Standard Modem, Null Modem, Tetra, iDEN, and ASTRO IV&D.
Note: The same modem configuration file can be used when configuring a port for
MDLC over IP or when configuring the port for dialup. For details, see Modem
Configuration File below. Note that for iDEN, Tetra and ASTRO IV&D the modem
configuration is not required, since the firmware already has these commands built in.
MDLC over IP/LAN Connections
The ACE3600 RTU can include one on-board 10/100 Ethernet BaseT port (ETH1) (not
in ACE3610) and up to two plug-in 10/100 BaseT ports (PI1 and PI2.) Each Ethernet port
has its own link ID and can be connected to the same or to a different network mask.
An Ethernet (LAN) port can be configured in one of several modes:
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Communications