rev1 ā Dec 2013 www.digitalcomtech.com 25
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 XANS command.
Destinations (DPs and DAs)
Syrus Commands: XADP, DA
A destination makes reference to the device or user that is receiving and/or sending
messages from/to the Syrus. The possible destination for the unit are:
o 6 IP hosts. 4 of these hosts are TCP only (00-03) and 2 hosts are UDP only (04-
05).
o 5 telephone numbers via SMS.
o 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 11 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 in
some cases a command may require a DP on its configuration.
Destination Points (DPs)
As mentioned there are 11 DPs, these are divided in the following way:
o The first 6 DPs (00 to 05) are IP hosts. These are defined with an IP address or a
server name and a TCP or UDP port number. The Syrusis a TCP and/or UDP
client which always starts the communication. This means that the IP host has to
be a TCP or UDP server listening for incoming connections on the same port
specified here. Keep in mind that DPs 00 to 03 are TCP only and the DP 04 and
05 are UDP only.
o The next 5 (DPs 10 to 14) make reference to phone numbers. These numbers are
used to send SMSs or make voice calls. They are also used as authorization
numbers for replying to receive SMSs commands and/or answering incoming
voice calls. Defining if a report should be sent as a Syrus command or using a
custom user message is also done here.
o The last DP (15) makes reference to the serial port.
For more information please refer to the XADP command.
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