9. Using Loggernet for GPRS communications ......... 24
9.1 Setting up to call a logger with a f ixed I P address .................................. 24
9.2 Setting up call-back in Loggernet ........................................................... 25
9.2.1 Se tting up call-back in Loggerne t Version 3 ................................. 25
9.2.2 Se tting up call-back in Loggerne t Version 4 ................................. 26
9.2.3 Kee ping the connection ope n when calling-back .......................... 28
9.2.4 Firewall issues ............................................................................... 28
10. Preventing COM110 modem Connection
Problems ............................................................ 29
11. Fault Finding ........................................................... 30
11.1 General.................................................................................................. 30
11.2 A GSM Base Station Fail s to Get a Response from the l ogger ............. 31
11.3 GP RS Fault finding – when us ing the logge r TCP/IP s tack .................. 31
11.3.1 Firs t s tag e fault finding ............................................................. 31
11.4 GPRS Advanced fault finding ............................................................... 34
11.5 GP RS Fault finding – when us ing the mode m TCP/IP stack ................ 35
Appendices
A. Using the COM110 with the PIN Security
Feature Enabled ................................................ A-1
A.1 Introduction .......................................................................................... A-1
A.2 CRBasi c Program Example .................................................................. A-1
A.3 CR10X P rogram Exampl e.................................................................... A-3
B. Controlling the P ower Supply to the COM110
Modem ............................................................... B-1
B.1 Controlling the P owe r Cons u m ption of the CO M110 modem .............. B-1
B1.1 CRBasic Program Exa m ple of P owe r Control ............................. B-2
B1.2 CR10X Progra m Exam ple ............................................................ B-4
C. Useful Configura t ion Commands for the
COM110 ............................................................. C-1
C.1 Signal Qua lity 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 COM1 1 0 in Transparent Mode for
GSM Dial-up use .............................................. D-1
D.1 Introduction .......................................................................................... D-1
D.2 Disabling the RLP Protocol ................................................................. D-1
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