Motorola MTP850 Ex Product Information Manual page 77

TETRA Network Protocol 1 (TMO)
Packet data applications will reside internally, over UDP, or in an external device connected to the 8
wire RS232 data port on the terminal. Communication to the external device is initialized using AT
commands.
11.2 Connectivity
The system provides point to point IP connectivity allowing the following datagram exchanges:
• Terminal <-> External Equipment (TE2) - PC and so forth.
• External Equipment (TE2) <-> Network (via Terminal)
The terminal supports IP version 4 and IP version 6 packets.
TNP1 services can use one of two PPP methods to connect from the TE to the MT, local mode, and
wide mode. TNP1 should be used in wide-mode wherever possible, so as to allow the parallel
operation of TNP1-SDS services and Packet date services over a common PPP link.
11.2.1 IP Addressing
11.2.1.2 Wide Mode
In this mode, all TNP1 services are available including packet data transfer towards the SwMI.
The address used is the dynamic address MS IP.
11.2.1.3 Local Mode
In this mode, all TNP1 services are available except packet data transfer. The address used are the
two static addresses TE IP: "10.0.0.100" and MT IP: "10.0.0.101".
11.2.2 Port Addressing
The terminal uses a fixed port address for reception and transmission of TNP1 packets. The port
number is 4024.
11.3 Service and Feature Interactions
11.3.1 TXI Mode
TNP1 is available in local mode when TXI is enabled although all SDS messages will be blocked.
The terminal will drop the wide mode connection if TXI is entered, thus the PEI would go back to AT
mode. It is then up to the TNP1 client to detect this and reinitiate the PPP session in local mode
(This is the choice of the TNP1 client).
11.3.2 DMO Mode
The terminal disables the TNP1 session while in DMO.
11.3.3 SDS and Packet Data
TNP1 implementation allows SDS and Packet Data transmission simultaneously.
11.3.4 AT Commands
AT commands are used to initiate the PPP service in order for TNP1 to operate. Once the PPP
session is running all AT commands are blocked. When the PPP session is closed then AT
commands are available to the programmer.
March 2009 Chapter 2 - MTP850 Ex/MTP810 Ex Product Information Manual
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