Campbell Scientific COM220 56k Phone Modem - Manual (Page 7)

Table of Contents
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1. Introduction ................................................................. 1
1.1 General Description ............................................................................. 1
1.2 Computer Requirements ...................................................................... 3
2. Specifications ............................................................. 3
3. Installation ................................................................... 3
3.1 Connecting to Datalogger .................................................................... 3
3.2 Connecting to Earth Ground ................................................................ 5
3.3 LoggerNet Setup .................................................................................. 6
3.4 Telephone to MD485 or Telephone to RF Systems ............................. 7
3.5 Telephone Service ................................................................................ 7
3.6 Connecting to a Surge Protector .......................................................... 8
4. Modem Settings .......................................................... 9
5. Troubleshooting........................................................ 10
Appendices
A.
Changing COM220 Settings ................................... A-1
A.1 DIP Switch Settings ........................................................................ A-1
A.2 Hayes AT Commands ..................................................................... A-2
A.3 Downloading a New Operating System to the COM220 ................ A-6
A.4 Program Examples .......................................................................... A-7
A.4.1 ModemCallback Example (for CR1000) ................................. A-7
A.4.2 DialModem Example (for CR1000) ........................................ A-8
A.4.3 P97 Instruction (for CR10X) ................................................... A-9
A.4.4 Example Programs for Data Callbacks via a CR1000
Datalogger Router .............................................................. A-11
B. CS I/O Connection .................................................. B-1
B.1 CS I/O 9-Pin Connection ................................................................. B-1
C. Theory of Operation ................................................ C-1
C.1 Theory of Operation ......................................................................... C-1
D. FCC Warning to Users of Class B Computing
Devices .................................................................. D-1
E. IC Information ......................................................... E-1
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