
ii
9. Using Loggernet for GPRS communications .........25
9.1 Setting up to call a logger with a fixed IP address..................................25
9.2 Setting up call-back in Loggernet ...........................................................27
9.2.1 Setting up call-back in Loggernet Version 3.................................27
9.2.2 Setting up call-back in Loggernet Version 4.................................28
9.2.3 Keeping the connection open when calling-back..........................29
9.2.4 Firewall issues...............................................................................30
10. Preventing COM110A modem Connection
Problems............................................................31
11. Fault Finding...........................................................31
11.1 General..................................................................................................31
11.2 A GSM Base Station Fails to Get a Response from the logger.............32
11.3 GPRS Fault finding –when using the logger TCP/IP stack..................33
11.3.1 First stage fault finding.............................................................33
11.4 GPRS Advanced fault finding...............................................................36
11.5 GPRS Fault finding –when using the modem TCP/IP stack................37
Appendices
A. Using the COM110A with the PIN Security
Feature Enabled................................................ A-1
A.1 Introduction..........................................................................................A-1
A.2 CRBasic Program Example..................................................................A-1
A.3 CR10X Program Example....................................................................A-3
B. Controlling the Power Supply to the COM110A
Modem............................................................... B-1
B.1 Controlling the Power Consumption of the COM110A modem ...........B-1
B1.1 CRBasic Program Example of Power Control .............................B-2
B1.2 CR10X Program Example............................................................B-4
C. Useful Configuration Commands for the
COM110A .......................................................... C-1
C.1 Signal Quality Checks..........................................................................C-1
C.2 Network Registration Checks...............................................................C-2
C.3 PIN Configuration................................................................................C-4
C.4 Changing the operating frequency between EU/Rest of world and
US wavebands..................................................................................C-4
D. Using the COM110A in Transparent Mode for
GSM Dial-up use..............................................D-1
D.1 Introduction..........................................................................................D-1
D.2 Disabling the RLP Protocol .................................................................D-1