User's Manual
CHAPTER2
Installingtheremotewirelessmodem
15
GPRSAPNUN "[username]"
where [username] is the name of the GPRS user's name
for the network provider (might be optional)
GPRSAPNPW "[password]"
where [password] is the password for the GPRS user
(might be optional)
The following examples show the GRPS parameters for an Austrian
mobile phone services provider:
GPRSAPNSERV "A1.net"
GPRSAPNUN "ppp@A1plus.at"
GPRSAPNPW "ppp"
0 CAUTION Parameter values are case sensitive. Be sure to correctly spell the
values of the GPRS parameters and use the appropriate case.
Misspelled names/entries could cause the RTU not to connect to the
GPRS network or A850.
ConfiguringtheTCPParameters
The RA440 will connect to the A850 only if the following TCP
connection parameters are set properly:
GPRSCONNADDR "[a850-ipaddress]" "[portnumber]"
where [a850-ipaddress] is the IP address of the A850
the RA440 has to connect to and
[portnumber] is the port number where the
communication with the gateway will occur; the IP
address parameter must be in decimal dotted notation,
e.g. 198.182.196.56 (required)
GPRSDNS "[ipaddress]"
where [ipaddress] is the DNS server address of your
GPRS network operator (optional)
Note: When using an Internet firewall in front of the LAN where the A850
Telemetry Gateway resides, be careful to properly configure the
firewall and the GPRSCONNADDR parameters [a850-ipaddress] and
[portnumber]. This is particularly important if you use NAT (network
address translation) on your firewall.
0 CAUTION If you are using an Internet firewall in front of your A850 Telemetry
Gateway, allow connection to devices only with IP addresses from
your GPRS network operator's IP networks to your A850 Telemetry
Gateway. When your GPRS network operator’s IP network addresses
changes, you must adjust your firewall's filters appropriately.
ConfiguringtheRA440GPRSconnectionsett ings
Use the following commands to define the intervals the RA440 will
wake up and connect to the A850 Telemetry Gateway: