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EK280 Application Manual 50
7.1.3
GPRS (TCPserv-Function)
In this modem operating mode you can access the EK280 via the network (Ethernet, TCP/IP), to which your
retrieval system is connected, i.e., you do not require an additional retrieval system modem. Data transfer is
normally faster than with GSM operation, as explained in chapter 7.1.2.
Here the GPRS Modem in the EK280 functions as a TCP-Server and may be addressed by a TCP client that
is listed in its readout software through a static IP address. To allocate a static IP to the modem during the
setup of the GPRS session, they must (together with their GPRS provider) maintain a virtual private network
(VPN) which must be enabled on the SIM used in the modem.
7.1.3.1 Parameterization
i
Before the modem can be used for GPRS operation, the GSM operating mode
(see Chapter 7.1) must have been finished and the best antenna position must have been
established. Then the GPRS function is activated on this basis and set.
i
For parameterization of the EK280 you will require a connection cable for the optical interface as
well as the enSuite application, which can be downloaded for free at www.elster-instromet.com.
a) Closing the time windows
In order that the parameterization works correctly the time windows 1 to 4 must be closed. To do this:

Connect a PC or laptop with enSuite installed to the EK280 optical interface using the connection
cable.

Start enSuite and set up the communication link to the EK280 over the optical interface. (see chapter
3.1 "
Setting up the communication link to the EK280 via optical interface ", page 15)

Select " Navigation " on the left-hand side and then " Parameterize online " at the bottom of the
navigation window.

In the top of the device window open the path " Parameters " > " Interfaces " by clicking on the relevant
plus signs, and then select " Call time windows ".

In call windows 1 to 4 set start and end to the same value for each one and then select the "Transfer
changes to device" icon at the top of the enSuite window.

Then wait a minute, for any communications activity in progress on the EK280 to be safely stopped.
b) Send parameter file

Send the following parameter file to the EK280 (see Chapter 3.6 "Send parameter file, page 17):
EK280_xvx.. - int. ECM-GW-120
– TCPServ active (GPRS) (*)
3

For the following customized settings and tests required, press " Navigation " on the left-hand side
and then " Parameterize online " at the bottom of the navigation window.
i
All the values listed in enSuite under " Parameters " can be found on the "Serv." display tab of the
EK280 under the same path.
c) Configure individual parameters

In the top of the device window open the path " Parameters " > " Interfaces " > " internal modem " by
clicking on the relevant plus signs, and then select " GSM and GPRS ".

On the right-hand side of the window you will now see several values, in which the following must be
entered:
3
The "x" stands for the version of software on the device, e.g. "2v2".
The star * stands for a small letter which indicates the version of the file, e.g. "a".