DCT Antares SB, Руководство пользователя

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4.3. *DESTINATIONS (DPS AND DAS)
The GPRS registration process is usually charged by the cellular
carrier, having an incorrect APN will make the unit constantly
try on failing GPRS sessions which could lead to an excess on the
unit’s bytes consumption.
Warning:
The APN value can not be changed over the air when communi-
cating via IP networks. This to prevent loosing communication
with the unit over GPRS when a wrong APN is used. The APN
can be modified over the air by means of SMS communication.
Note:
Once the GPRS session is up the unit is ready to communicate with IP
networks (i.e. with IP addresses). For this, the cellular carrier assigns the
unit an IP address that is usually but not necessarily dynamic, meaning that
for every session the unit starts its value changes. The actual IP address
assigned by the operator through the chosen APN can be consulted with
the
XAIP
command.
4.3 *Destinations (DPs and DAs)
A destination makes reference to the device or user that is receiving and/or (*)Essential configuration
sending messages from/to the Antares SB
TM
. The possible destination for
the unit are:
•
10 IP hosts. Via TCP and/or UDP.
•
5 telephone numbers via SMS.
•
The unit’s serial port.
Each destination is called a Destination Point (or simply a DP). Destination
Points may be grouped to form a Destination Address (or simply a DA). As
you can deduce from the list, there are 16 DPs. The unit offers 10 possible
combinations of DPs, leading to 10 DAs. In the majority of cases DAs are
used to tell the unit where to send its report but sometimes (i.e. some
commands need) an specific destination (a DP) is required.
4.3.1 Destination Points (DPs)
As mentioned there are 16 DPs, these are divided in the following way:
•
The first 10 (DPs 00 to 09) are IP hosts. These are defined with
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