ii
8. Using Loggernet for GPRS communications
......... 27
8.1 Setting up to call a logger with a fixed IP address or when using
the Konect Routing Service ................................................................. 27
8.2 Setting up call-back in Loggernet ........................................................... 28
8.2.1 Setting up call-back in Loggernet Version 3 ................................. 28
8.2.2 Setting up call-back in Loggernet Version 4 ................................. 29
8.2.3 Keeping the connection open when calling-back .......................... 31
8.2.4 Firewall issues ............................................................................... 32
9. Using Loggernet for GSM dial-up
............................ 33
9.1 Configuring a desk-top modem as a base station .................................... 33
9.2 Configuring the COM111 modem as a base station using Loggernet ..... 33
9.2.1 Extending the default time-outs .................................................... 33
10. Preventing COM111 connection problems
........... 34
11. Fault finding
............................................................ 35
11.1 General.................................................................................................. 35
11.2 The modem cannot be configured using the Mobile Data Assistant
package .............................................................................................. 36
11.3 GPRS/3G fault finding – when using the logger TCP/IP stack ............. 36
11.3.1 First stage fault finding ............................................................. 36
11.4 IP advanced fault finding ...................................................................... 39
11.5 GPRS fault finding – when using the modem TCP/IP stack ................. 40
11.6 A base station fails to get a response from the logger with a modem
in GSM dial-up mode ........................................................................ 41
Table
1. COM111 Modem Power Supply Connections via a PSW12 switch ......... 18
Figures
1. Connecting the COM111 modem to a Datalogger using an SC-WMI ...... 17
2. Low-gain, wideband antenna supplied by Campbell Scientific................. 20
Appendices
A. Controlling the power use of the COM111
modem and methods of resetting the modem
......... A-1
B. Useful configuration commands for the COM111
..... B-1
C. Configuring the COM111 using the datalogger
talk-thru mode
............................................................ C-1
